The Big Bang Theory/Running Gags

The running gags in The Big Bang Theory include many stunts and dialogues that repeatedly come up in the episodes.
==Stunts==
Leonard
* Getting mocked for his lactose intolerance and being short.
Sheldon
* His inability to understand sarcasm or irony.
* Sheldon's spot on the couch.
* Sheldon's Knock, knocking 3 times, saying the name of the person addressed, and repeating it twice after.
* His blaming others for things going wrong that he has done.
* His incessant rants.
* Someone asks Sheldon "Why?" and others get upset since Sheldon has been given an opening to deliver a long explanation.
* Someone sings "Soft Kitty" to comfort Sheldon when he is sick, or vice versa.
* Sheldon getting restraining orders, especially from his favorite celebrities and famous scientists.
* Embarrassing Amy and Penny.
* His constant asking questions about the food he's being served. Most of the time, Leonard gets it wrong with one detail.
* People saying that he is insane and Sheldon telling people he is not crazy because his mother "had him tested" (as a child).
* Sheldon changing the wi-fi password to something that references Penny's freeloading on it.
* He is an unintentional jerk to everyone.
* Says “BAZINGA” when finishing a joke.
Penny
* She gets promiscuous and morally loose when she drinks. In addition, she turns to alcohol immediately when about to deal with a ridiculous situation (i.e. when dealing with Sheldon). 
* Her anger.
* The "check engine" light in her car until she gets a new car.
* Her lack of education and awareness of not graduating community college.
* Her sloppiness.
* Using her "charm" to get by not paying for things and for getting free meals
* Her maiden name unrevealed
* She is occasionally mocked for her many boyfriends
* Asks Sheldon why he thinks something, which is met my a “No No No Don’t” by the rest of the gang 
Howard
* He gets mocked for not having a Ph.D., especially by Sheldon.
* His sleaziness (until he got married).
* Doing/eating un-kosher things, despite being Jewish
*His peanut allergy
Raj
* His selective mutism, until the end of the episode "The Bon Voyage Reaction":
* Being forced to whisper things into someone's ear (usually Howard's) when he's near a woman (usually Penny).
* He gets drunk to overcome his selective mutism but ends up saying very inappropriate things.
* Going against Hindu traditions, including eating beef
* Having a bit of a feminine side
* His close relationship with his dog, Cinnamon
Stuart
* His depression and loneliness
* He often has a lack of revenue in his store
* People are unable to identify his age
* Everyone is constantly forgetting him
Amy
* Monkey references and comparisons.
* Girl crush on Penny.
* Romantic frustration with Sheldon.
Bernadette
* Her short temper and aggressive nature.
* Her competitive side.
* Her high-pitched voice (which Howard has mocked)
* Her sounding exactly like Howard's mother when she yells or gets angry.
* She is constantly made fun of for her height.
Mrs. Wolowitz
* She always yells from off-screen.
* Her face is never visible.
Emily
* Her interest in horror and gore-themed content
* Has rather questionable tattoos
Leonard and Sheldon
* Sheldon taunting Leonard with "The Roommate Agreement".
* Sheldon putting himself into Leonard's romances, much to his dismay
* Sheldon and Leonard preferring each other's mothers for a mother and getting along better with each other's mothers than their own respective ones.
Howard and Raj
* They seem as though they are a homosexual couple, but aren't.
* Being so close, that Howard is able to feel whenever Raj is in trouble, and vice versa
Leonard, Penny and Sheldon
* Leonard and Penny acting like Sheldon's parents.
* Sheldon blaming Leonard for first speaking to Penny when she moved in the building in the Pilot episode.
The stairs
* Awkward silence while walking up the stairs.
* Running down the stairs.
* Common elevator complaints 
Kripke
* His perverse nature
* His speech impediment
* Sheldon's rivalry with him, which Kripke surprisingly wins most of the time
Others
* Shot of a front door while a character abruptly exits with someone screaming "Get out!"
*People getting the door slammed in their face.
* Colonoscopies are frequently mentioned.
==Dialogues==
* "Bazinga!" - Sheldon
** "Once again, you’ve fallen for one of my classic pranks. Bazinga!" - Sheldon
* "Here we go..." - Multiple users (usually followed by one of Sheldon's "psychotic rants")
* "Holy crap on a cracker!" - Penny
* "Whaaaaaaaaaaat?!" - Leonard
* "HOWARD" - Mrs. Wolowitz
* "Rats..." - Sheldon
* "I'm not crazy/insane. My mother had me tested." - Sheldon
* "In what universe..." - Multiple users
* "...jibber jabber..." - Multiple users
* "...offer them a hot beverage." - Sheldon
* "Oh not this again." - Sheldon
* "Oh balls!" - Penny
* "Oh (my) God!" - Penny
* "...on purpose." - Multiple users
* "Sweetie..." - Penny
* "That's the spirit" - Leonard
* "There, there." - Multiple users
* "This may be the wine (magic potion) talking..." - Multiple users
* "What the frak?" - Howard
* "You're in/That's my spot." - Sheldon
* "You're welcome." - Multiple users (said before he thinks someone should say "Thank you".)
* "Your check engine light is on" - Sheldon/Amy/Beverly
* "...rat bastard..." - Penny/Amy
*  "...hippie-dippy..." - Sheldon 
* "...batcrap crazy..." - Multiple users
 
Category:Reference Materials
Category:Leonard Hofstadter
Category:Sheldon Cooper
Category:Rajesh Koothrappali
Category:Howard Wolowitz
Category:Stuart
Category:Penny
Category:Amy Farrah Fowler
Category:Bernadette Rostenkowski-Wolowitz
Category:Emily Sweeney
Category:Mrs. Wolowitz
Category:Soft Kitty
Category:The Roommate Agreement
Category:Season 1 (The Big Bang Theory)
Category:Season 2 (The Big Bang Theory)
Category:Season 3 (The Big Bang Theory)
Category:Season 4 (The Big Bang Theory)
Category:Season 5 (The Big Bang Theory)
Category:Season 6 (The Big Bang Theory)
Category:Season 7 (The Big Bang Theory)
Category:Season 8 (The Big Bang Theory)
Category:Season 9 (The Big Bang Theory)
Category:Season 10 (The Big Bang Theory)