Here are some of the most used forum lingo abbreviations. I know these get posted every once in a while but there may be newer members that have not seen these. Of course all of you IM (Instant messaging) users are pros at this by now.
AFK - Away from keyboard
B - I'm back
BBFN - Bye bye for now
BBL - I'll be back later
BFN - Bye for now
BG - Big grin
BO - Brain overload
BRB - I'll be right back
CMIIW - Correct me if I'm wrong
CU - See you
CUL8R - See you later
EG - Evil grin
FIIOOH - Forget it. I'm out of here
FITB - Fill in the blank
G - Grin
G2G - I've got to go
IMHO - In my humble opinion
IMO - In my opinion
JK - Just kidding
L8R - Later
LOL - I'm laughing out loud
NE1 - Anyone
OMG - Oh my gosh
ROFL - Rolling on the floor laughing
ROFLMAO - Lori's version which ends with my a-- off
TIC - Tongue in cheek
TTFN - Ta Ta for now
TTYL - I'll talk to you later
WB - Welcome back
Add your favorites here as well.
AFK - Away from keyboard
B - I'm back
BBFN - Bye bye for now
BBL - I'll be back later
BFN - Bye for now
BG - Big grin
BO - Brain overload
BRB - I'll be right back
CMIIW - Correct me if I'm wrong
CU - See you
CUL8R - See you later
EG - Evil grin
FIIOOH - Forget it. I'm out of here
FITB - Fill in the blank
G - Grin
G2G - I've got to go
IMHO - In my humble opinion
IMO - In my opinion
JK - Just kidding
L8R - Later
LOL - I'm laughing out loud
NE1 - Anyone
OMG - Oh my gosh
ROFL - Rolling on the floor laughing
ROFLMAO - Lori's version which ends with my a-- off

TIC - Tongue in cheek
TTFN - Ta Ta for now
TTYL - I'll talk to you later
WB - Welcome back
Add your favorites here as well.
Comment