afk........... "Away From Keyboard", similar to "brb", when a player has stepped away momentarily.
amp............. Double the pain.
arrrg........... Sometimes used when a player is "fragged". Sounds like Arnold Schwarzenegger's death cry.
ban............. Used on a player or "mod" for cheating. Note: mods should be verified by multiple players and warnings are given.
beat down....... A degrading form of death (aka frag).
brb............. "Be Right Back", when a player must leave the game for undetermined reason (potty break).
cya.......... Same as "See ya. "A common salutation.
f.......... unknown, typically a typo.
frag.......... When a player dies a painful death.
ftw.......... "Facing The Wall". When a player is pre-occupied with something other then the game. This player typically ends up with charge his/her on face.
fu.......... see "f".
gg.......... "Good Game", used at the end of game by players.
grogg'd it........ When a player shoots a fusion and gets no frag, typically premature.
grrr.......... A growl. Typically heard by NoClanFrank when someone beats him to the HMG or Fusion.
gtg.......... "Got To Go", used when a player is leaving the game. Typically followed by "cya" or "l8r".
hmg.......... "Heavy Machine Gun" not often used by players that can aim and run at the same time.
l8r.......... Version of "Later", used when a player leaves a game.
lol.......... "Laughing Out Loud", this Is used a lot when a player gets beat down (It's all about having fun).
mod.......... Player that has "modified" the game to his/her advantage (e.g. cheater).
modder.......... see "mod"
ns.......... "Nice Shot", used when a player is fragged while in a position that they feel invulnerable. Note: There is no such place.
pfft.......... The sound Nurse makes after eating a large English breakfast.
pull.......... Often used when a player is shot while in the air, such as in skeet shooting.
rcon.......... Service used by remote users to "ban" a mod if need be, or change the game map.
rf.......... Short for Red Faction (duh).
rofl.......... "Rolling On Floor Laughing"
sigh.......... What is typically heard after a "mod" player (given multiple warnings) has been "banned" (e.g. RED JUSTICE).
sup.......... Short form of "What's up"
ta.......... English version of "ty" (thank you).
T.M.I.N.E........... Too Much Is Not Enough.
ty.......... "Thank You", often heard after a "ns" comment from one player to another.
wb.......... "Welcome Back", a greeting given to a returning player.
wtf.......... "Way To Frag", not sure, but it must mean this because profanity if frowned upon.
yo.......... "Hello", a form of greeting, used by 'psyko', 'jackass' and a host of others.
yw.......... "Your Welcome", not used often because the player typing may get fragged in doing so.
:-(.......... Pout
:-).......... The typical "smile" of a job well done.
:-|.......... Average Joe (or…Norm in this case).
:-P .......... Toungue wagging.
(_*._) .......... Hello, bye bye, up yours, nice shot, etc. (according to a_cute_hemroid).