Language and Cat Slang

Cats in the Clan of Sunlit Prairies are capable of communicating in several ways, including those that are nonverbal, including tail gestures, etchings in the dirt, or paintings to name a few. Cats often meow, purr, yowl, or make other noises towards one another for a variety of reasons, and due to this, they have their own seperate language from other creatures, who speak their own tongue similar to cat speech. Though, cat speech is known to be quite a lot more versatile- at least in the opinion of those who have it. 
Cats are able to tell one another things with movements of their tail, such as hooking it when confused, "buzzing" it when excited/happy, or on occasion, even in a flirtacious regard, and different signs and gestures to communicate commands to patrols without needing to alert others of their presence. Cats are very intuitive with their tactics, taking their language to useful heights by providing them with means of luring prey by imitating their calls. 
Cats, obviously, cannot communicate with other animals. Not that they should want too, anyway, considering the cycle life takes them through. Cats cannot understand other languages... Aside from the only exception; kittypets.
Kittypets, and those with kittypet heritage who spent most of their life with a two-leg, may begin to learn different terms and words for things that other cats wouldn't, such as "car, window, and bathtub." This isn't limited to swears either- with cats being able to pick up on these things due to growing up around it, they somewhat can adopt this language- though of course not to any meaningful level to the two-leg. Kittypets that live with dogs may also learn to understand portions of what they say, and with enough practice and skill, they may even be able to repeat these barks in a very limited capacity to ward them off. speaking in one word sentences like dogs would in this universe; "Bad. Bad. Shoo. Shoo." For example, to scare off a dog. 
== Slang and Other Terms ==
These are portions of language developed overtime, occasionally varying in generations of the cat speaking the tongue. Different slang comes and goes between generations, though largely, most basic insults and terms for things are overall baseline for the most part.
=== General Terms ===
Carrionplace = Junk yards or two-leg dumps located on the outskirts of the Lambent Enclaves.
Carrion = Any amount of rotten food. Food left out for more than a week will begin spoiling, and will begin being referred to as carrion. Carrion is unsafe to eat and can cause major complications, if not death, if consumed.
Cutter = The Vet- specifically one that were to desex a cat, making them unable to produce kittens if done properly.
Dirt = Feces.
Fresh-Kill = Any recently killed piece of prey caught for the purpose of consumption.
Half-Bridge = Boat Dock
Horseplace/Barn = General name for any farms containing livestock of some kind, usually signified by a structure that cats may seek shelter within,
Hunting Patrol = Cats, warriors and apprentices, who are tasked by either the Council, deputy, or the Leader of the clan to retrieve fresh-kill for the clan's prey pile. They're usually consisting of Moor-Runners and Trackers, with the occasional Sentinel for defensive purposes.
Border Patrol = Cats, warriors and apprentices, who are tasked by either the Council, deputy, or the Leader of the clan to check the borders of clan territory, refreshing markers on their boundaries, searching for predators, and challenging intruders if any are discovered. 
Monster = Car, any make or model or size. Boats are "water monsters."
Monster-Kill = Anything killed by a monster on the thunderpath, usually referring to roadkill like prey. Has a particularly rancid and foul taste if scavenged, 
Pelt-Dens = Tents, these can be constructed by cats or by invading two-legs. 
Red-Stone = Bricks. "Red-Stone Heights" would refer to a brick building. 
Heights = Any two-leg building or structure. 
Rogue = A (usually aggressive) band of cats that live independently from the clan's rules, boundaries, and ideals. They are most often than not violent groups of cats who are looking to challenge the clan for it's resources and territory.
Sharing Tongues = The act of one cat listening to and grooming another while they share the latest gossip with them. 
She-cat = Female cat. (This can be seen as derogatory, depending on the context! For example, Carrionsaunter may choose to call a molly a "she-cat" specifically despite his passages using "molly" to refer to them normally.) 
Molly = Female cat.
Dam = The "proper" term for a mother cat who is currently suckling kittens. Not a particularly appealing way to call a molly "mom," this can also be used as derogatory, in the right context. 
Silver-Boulder = Two-leg trashcans. To cats, they are seen as occasional hotspots for scavenging. 
Silverpath = Railroads, only Thundersnakes and Half-Monsters travel on them.
Half-Monster = What appears to be "half" a monster, capable of running on the silverpath like the thundersnakes, though it's unlike regular monsters, lacking the distinct smell and being half the size. These are quite harmless and slower moving.
Thundersnake = Trains. Cats are able to hop into open compartments if they wish to travel... Though Silkstar only knows where it'll take them.
Silverpelt = Direct representation of Starclan, referring to the blue-black velvet sky and the speckled "starry warriors" that live among her. The Earth is seen as a giant cat to the Clan to a degree, with the sky being the extent of her pelt, her starry warriors make up her pattern, with the moon as her brain, hence the "pelt" portion. 
Silverthorn = Barbed wire.
Soft Boulder = Pillow or cushion of some kind.
Sun-Drown-Place = Alternative description for the beaches surrounding the clan's territory, mostly referring to where the vast ocean meets the sun.
Sire = The "proper" term for a cat who fathered kittens. Another term for Dad.
Tree-Eater = Bulldozer.
Tom/Tomcat = Male, "tom-cat" can be seen as derogatory similarly to how "she-cat" can be. 
Two-leg = Humans. They can also be called nofurs, giants, upwalkers, etc.
Two-leg kit = Human children that are younger than 18 (or appear as such.) 
Two-leg nest = Human house.
Twolegplace = Another term for the Lambent Enclaves, any city or village two-legs live in.
Warrior = An adult cat, one who is fully trained in any of the available roles in the clan, this usually implies a cat who is capable and trusted to the clan. 
=== Time terms ===
Night-chill – leaf-fall alternative.
Ice-chill – leaf-bare alternative.
Warmingtime – newleaf alternative.
Leafshine – greenleaf alternative.
Icetime – leaf-bare alternative.
Leafrise - newleaf alternative.
Newleaf = The season of spring.
Greenleaf = The season of summer.
Leaf-Fall = The season of fall.
Leafbare = The season of winter.
Moon = The time between one full moon to the next, aka a month.
Moonhigh = Midnight, when the moon is highest in the sky.
Quarter-Moon = About a week.
Sunhigh = The point the sun is highest in the sky; noon.
Sunrise = One day in cat time. (ie: one sunrise ago.)
Season = A quarter of a year in cat time. Four seasons make for a year. 
Sundown = Dusk
Sunup = Dawn
Claw-Moon = Crescent moon, named as such because it resembles the shape of an unsheathed claw.
=== Distance Terms ===
Claw-length – About the length of cat's claw; less than an inch. 
Fox-length – About the length of a fox; approximately a yard. 
Frog-length – About the length of a frog; approximately two to four inches. 
Kittenstep or kitstep – About the length of kit's step; approximately an inch or a half-inch. 
Rabbit hop or rabbit length – About a foot and a half away. 
Reed-length – About the length of a reed; 5 feet or less. 
Mouse-length – About two or three inches. 
Muzzle-length – About one inch. 
Pawstep – About the length of a grown cat's step, roughly six inches. 
Tail-length – About the length of a cat's tail; approximately a foot. 
Tree-length – About the length of a tree; around 40 to 50 feet. 
Whisker-length – About the length of a cat's whisker; less than two inches. 
=== Swears, Exclamations, and Other Phrases ===
Beetle-brain – Friendly insult; similar to mouse-brain.
Caught-prey – A dead prey animal caught for the purpose of consumption; similar to fresh-kill.
The giving of close comfort - Grooming another cat's fur, especially in times of hardship.
As easy as swallowing a minnow – A phrase used to indicate easiness of the task.
As much use as a dead fox – A (harsh) insult, meaning the recipient is useless.
Bat-blind – An insult to a cat's eyesight, similar to the phrase "as blind as a bat".
Bee-brain – A similar exclamation to "bees in your brain".
Bees in your brain – An exclamation meaning confusion or a cat not making sense. (i.e., you've got bees in your brain!)
Buzzardfood – Alternative of crowfood.
Cleanpaw – A scornful insult used for someone who sticks to the rules closely.
Crowfood – A (harsh) insult comparing the recipient to rotting prey animals (as in I'll turn you into crowfood!), or suggesting that they eat it (as in crowfood-eater).
Don't get your whiskers in a twist – An expression used to tell someone not to get upset over a trivial matter. Equivalant of "Don't get your knickers in a twist".
Doesn't matter a whisker/Doesn't catch so much as a whisker – An expression meaning the cat does not care, (i.e. it didn't matter a whisker that she didn't share their beliefs) similar to I don't give a mousetail. Or saying that a patrol didn't catch anything.
Dormouse – An expression and exclamation used against a cat who sleeps a lot.
Dungface – A harsh insult. 
Featherbrain – Equivalent to mouse-brain.
Fishface, fishfur or fish-breath – An insult used commenting usually about a cat's hygiene (or generally, a lack thereof.) 
Flea-brain – A (friendly, yet harsh) insult. The severity of the insult is almost always dependant on tone.
Foxbreath – An insult used to compare the recipient's breath to that of a fox.
Fox-dung – A (harsh) insult comparing the recipient to fox feces. Also used as an exclamation. (as in That's fox-dung!)
Fox-hearted – An insult meaning cruel, cold-hearted, or evil (as in fox-hearted Twolegs).
Frog-dirt and fish-guts – An exclamation that has the same meaning as thistles and thorns.
Frog-dung – Same as fox-dung.
Furball – A (friendly, yet harsh) insult. The severity of the insult is almost always decided by tone.
Fuzz-brain – A (friendly, but harsh) insult. The severity of the insult is almost always decided by tone.
Gray-pelts - A derogatory term used against elders and senior warriors.
Great Silkstar! – An exclamation used to signify extreme surprise or anger. Similar to "Oh my God!" in usage and to the fact that they both have mention of a higher force.
Hare-brain – An insult similar to mouse-brain.
Hare-dung – Used as an exclamation, similar to "mouse-dung". Somewhat like "darn it!"
How in Silverpelt? – An exclamation used meaning "How in the world?"
I don't give a mousetail/They wouldn't give a mousetail – An exclamation meaning that the cat does not care. Another variation is I would ____ for a couple of mousetails, meaning that they are willing to do the inserted action for no real reward. Can also mean that a cat would be stingy enough not to share a mousetail.
I'd have shredded you into mousedust! – To gravely injure, rip to shreds. Similar to mousemeat. Used to intimidate others.
In all the stars - An exclamation of disbelief.
It's as dark as a fox's heart – A phrase used to describe darkness.
It's better to scare off a mouse than welcome a badger – An old nursery saying that means that it's better to scare away a friendly cat than welcome a not-so-friendly cat.
Kill two prey with one blow – Meaning to solve two problems with one action or solution. Equivalent of "Kill two birds with one stone".
Load of fox-dung – Referring to something that is not true, a mass of lies. Somewhat similar to That's a load of badger droppings.
Load of thistledown - Referring to something that is not true, a mass of lies. A more light-hearted variant of load of fox-dung.
Make dirt – To use the bathroom, or the dirtplace in warrior terms.
May Silkstar light your path/Banish all the fleas from your nest – A friendly term used to tell others they wish them well.
May the Sun warm your back and the fish leap into your paws – A blessing formerly used in Desolate Tundras and Rippling Streams; used to wish good dreams or, in some instances, to say farewell to a dead cat.
May you find good hunting, swift-running, and shelter when you sleep – An ancient farewell used by the Clans, to say goodbye to loved ones on their way to StarClan.
Minnow-brain – An insult that is friendly but harsh. 
Mouse-brain – A (friendly yet harsh) insult. The severity of the insult is almost always decided by tone.
Mouse-breath – A insult possibly used to intimidate someone.
Mouse-dung – A (somewhat harsh) insult comparing the recipient to mouse feces. Also used as an exclamation (as in Mouse-dung! That can't be right!). Somewhat like "Darn it!"
Mouse-hearted – An insult that describes one who is cowardly.
Mousefodder – An insult describing that the cat is worthless or a kittypet.
Once a kittypet, always a kittypet! – A harsh phrase used to describe a cat with kittypet roots.
(Only) Silkstar knows (what) – Sometimes used to answer a question that is impossible to answer. Similar to "only God knows what," "only God knows," & "God knows."
One piece of prey in [one's] paws is worth two in a tree – A phrase of the same meaning as "a bird in the hand is worth two in the bush."
Pain in the tail – An insult meaning a cat is irritating or lazy.
Rabbit-brain(s) – A common insult used against Sunlit Prairies cats by antagonizing outsiders. It can also be used in a friendly but still harsh way between clanmates.
Rabbit-chasers – A common insult used against Sunlit Prairies cats by antagonizing outsiders.
Scaredy-mouse! – A similar expression to "scaredy-cat", referring to a cat easily frightened.
Scaredy-sparrow – Same as the term "scaredy-mouse." 
Smart-ears – A friendly insult.
Snake-heart(ed) – Similar to the term "fox-hearted."
Snake-tongue – An insult meaning cold or unfair; similar to "fox-hearted" or "snake-hearted"
Sorry catches no prey or Sorry fills no bellies – Means cats can be sorry, but that it will not change the past.
Silkstar's kits! – An exclamation of surprise or disbelief. Sometimes used as an exclamation if a cat is hurt.
Silkstar in the sky! – An exclamation of astonishment.
Stirring up a bee's nest – A phrase meaning a cat is looking for trouble or starting it.
Sunshine and daisies – A phrase meaning the same as "sunshine and rainbows." 
Tabbies don't change their stripes – Meaning that a cat doesn't change their nature. Equivalent to "a leopard can't change his spots."
Tail-licker – An insult intended for a cat who is sucking up, similar to the word bootlicker.
(That's a) load of badger droppings – A harsh exclamation saying that something is nonsense.
That's just bat droppings – A harsh exclamation saying that something is nonsense.
Thistles and thorns – Used to describe bad luck (as in: Thistles and thorns! I blew it!); similar to "Darn it" or "mouse-dung."
Thistle-fluff – A harsh insult.
Toad-brain – Similar to mouse-brain.
Thundercat – An insult referring specifically to how loud a cat can be.
Weasel heart - A (harsh) insult, similar to calling someone a rat or a snake. 
We'll cross that river if we come to it – A phrase meaning the same as "we'll cross that bridge when we come to it."
What in StarClan's name? – An exclamation similar to "What on earth?" or "What in the world?"
When hedgehogs will fly – An exclamation style statement that shows disbelief that a certain event will likely occur (as in That will happen when hedgehogs fly), used in many variations. Somewhat like the human phrase, "When pigs fly!"
Who made dirt in their fresh kill/nest? – A phrase to describe a cranky or suddenly moody cat.
Who ruffled their fur? – A similar way of saying "who got under their skin?"
Wild rabbit hunt – A phrase of the same meaning as "wild goose chase."
Would've made mousemeat out of you! – To badly injure, rip to shreds. Similar to mousedust.
You fight/hunt like a kittypet! – An expression used to insult or tease a cat who fights/hunts poorly.
(You're) crazier than a fox in a fit! – An insult used when a cat (or cats) are acting crazy. Another variation uses "madder" instead of "crazier."
Silkstar/I swear to Silkstar = God, Silkstar is Sunlit Prairies' equivalent to a God. Blizzardfang would be somewhat of a "jesus" to them, to a limited degree. 
=== Slang ===
Blizzardfang's Mercy = Jesus Christ (as in a swear,) implemented following Blizzardfang's arrival back from Starclan, some cats have began swearing in his name, rather than continuing to use the age-old variant swearing on Silkstar's name. 
Buzz = Rizz, aka a cat's ability to charm or seduce a potential partner (and or making attempts to do so.). "Kittypet Buzz" would refer to bad rizz, aka having no game, getting no bitches, being deplorably undesirable and unattractive for one reason or another. Buzz on it's own is a compliment, in the eyes of some, however. "Buzz" refers to the action of a "buzzing" tail-tip as well, one that vibrates and swishes around enticingly. Apprentices have began seeing this as a hilarious joke, and often will comment on how much "buzz" they think a cat has.
(example: "Carrionsaunter has such L Kittypet Buzz." / "Stop trying to buzz up Dawnstar.") 
Join the Patrol = Join the Club
(example: "Man I can't stand this rain"  "Join the patrol..." )
== References/Resources ==
Since we're a warrior cats roleplay, i largely copied most of what appears on the warriors wiki!! All of the credit for the work is to them (in regards to canon compliant terms.)
I've also been taking help particularly from our beloved members Mads, Mako, and Comet!! Thank you guys so much for your help on the slang terms!! They're so much fun :D