Terminology

WNS: Winner Next Slide.
NGW: New Game When?
HTYD: Host 'til You Drop; one or many magnanimous hosts will host for an extended period of time until their bodies can no longer take it.
Samefag: An individual submitting more than one tribute into the same game - usually not allowed before being asked for by the host. 
Host: The individual who creates the thread, decides the code, generates the game, and posts the slides & commentary.
Code: A unique, custom made set of events compiled into a single game. Most are found on the tools page, but some have personal codes, like Stefan and JC. 
Tribute: An image (with a name) submitted to a thread.
Wetfat: Sweaty and weird. Stay away.
NGW: An individual, usually anon, asking New Game When? - when a new game will happen. Usually said at the end of a thread.
Newfag: Someone new to /hg/ and possibly uneducated in some form to the culture. Often used in a hostile manner.
Oldfag: Opposite of a newfag.
Mute: Someone who doesn't talk during games and doesn't respond to slides.