Thank you Desideria and Clare (SL Name) - I added your acronyms.
2l – Second Life
AFK - Away from KeyboardakiRLa - also known in Real Life as
akiSLa - also known in Second Life as
AO - Animation Override
brb - be right back
HUD - heads-up display
kiRLa - known in Real Life as
kiSLa - known in Second Life as
KK - Okay Cool (slang is K'Kool)
LL - Linden Labs
LM - Landmark
Mud - multi-user dimensions
MMORPG - Massive Multiplayer Online Role Playing Game
np - no problem
nvm - never mind
OMG! - Oh my God!
rotfl - rolling on the floor laughing
rotflmao - rolling on the floor laughing my ass off
SL - second life
SLNN – Second Life News NetworkTP - Teleport
ty - thank you
Please feel free to add to this list if you know of any SL acronyms you would like to add. I will gladly add them.