If anyone notices any missing from this list please let me know.
AFAIK - As Far As I Know
AFK – Away From Keyboard
Asap - As soon as possible
ATM – At the Moment
BBS – Be Back Soon
Bio - Biological function break (Bathroom, etc.)
BS - Can mean either Blacksmith or Bull Poopie, depending on context
BRB – Be Right Back
BRT - Be right there
BTW – By The Way
BYO<?> – Buy/Bring Your Own <Insert letter for fourth phrase here, ex. Mats: BYOM>
D/C - Disconnected (from the game)
EULA - End User License Agreement, a legal document of most games
ERP – Erotic Role Play
FPS - First-Person Shooter (games), or Frames per Second (WoW) depending on context
FYI – For Your Information
FTL - For the Loss/Lose (meaning you dislike something)
FTW - For the Win (meaning you think something is awesome)
GG – Good Game
GJ – Good Job
GL - Good Luck
GTFO – Get the Flip Out/Off
GTG/G2G - Means either "good to go" or "got to go", depending on context
GZ - Grats
H/O – Hold on
IDC – I don’t care (IDRC can also be used for “I don’t really care”).
IDK – I don’t know.
IIRC - If I Recall Correctly
IMHO/IMCO – In My Honest/Humble Opinion/In My Considered Opinion
IMO – In My Opinion
IRL – In Real Life
JK - Just kidding!
LAWL - Laugh(ing) a Whole Lot
LMAO – Laughing My (rear end) Off
LMK – Let Me Know
LOL – Laughing Out Loud
Lul - A variation of "Lol", the letters don't individually stand for anything.
MMORPG – Massively Multiplayer Online Roleplaying Game
Newb – Newbie (A new person), not usually used to insult
Noob – A generally insulting term for someone who is disruptive/inattentive. (Some players think newb and noob mean the same thing, and refer to newbies as noobs.)
NP - No Problem
NPC – Non-player character (a computer-run person in the game)
NTY – No, Thank You
Nub – Non-useful body. Most players simply throw this term around.
Ofc – Of course
OIC – Oh, I See
OMG/zOMG - Oh my God/Gosh
OMGWTFBBQ - Expresses total shock or confusion to the point of the brain being reduced to barbecue.
OMW – On My Way
OP – Original Post(er) (forums), Overpowered (class, spell, etc)
Pls/Plz/Plox - Please
PvE – Player versus Environment
PvP – Player versus Player
Pwn – Typo of the word “own”, usually used when someone is overwhelmingly defeated. "Pawn/pown" is also sometimes typed.
ROFL – Rolling on Floor Laughing
RP – Role Play (Usually PvE)
RPPvP – Role Play Player versus Player
Srsly - Seriously
Sry/Soz - Sorry
TL;DR – Too long; didn’t read
TMI – Too Much Information
Troll – Someone who intentionally provokes unfavorable reactions in others
TY – Thank You
w/e - Whatever
WB – Welcome Back
w00t! - Originally was a combination of the words "wow, loot!" But is now used just to express excitement.
WTF - See below abbreviation; replace "hell" with less desirable word
WTH – What/Who The Hell
WTV – Whatever
XD – A smiley face. Think of the biggest grin you can make.