ASL = Age / Sex / Location?
ATM = At the moment
B/C = Because
B2K / BTK = Back to Keyboard
B3 = Blah, Blah, Blah
B4YKI = Before You Know it
BAE = Before Anyone Else
BFF = Best Friends, Forever
BM&Y = Between Me and You
BRB = Be right Back
BRT = Be right There
BTAM = Be that as it May
BTT = Back to Topic
BTW = By the Way
C-P = Sleepy
C&P = Copy and Paste
CTN = Cannot talk now
CU = See you
CUS = See You Soon
CWOT = Complete Waste of Time
CYS = Check your Settings
CYT = See You Tomorrow
DAE = Does anyone else?