Okay Chris,
You asked for it!! I am sure that you will get tons of responses on this one!
I only know a few.........but others on here know many!
Here's some fun ones for im:
LOL - Lots of Love or Laughing out Loud
BRB - Be Right Back
LMAO - Laughing my a-- off
yw - your welcome
ty - thank you
sec - means one second (but usually more!)
k - means okay
MYOB - Mind Your Own Business
and there are many, many more!
Mary