ROFLMAO= Rolling on the floor laughing my ass off
LMBO= Laughing my butt off
LOL= Laughing out loud
BRB= Be right back
BRT= be right there
BTS= be there soon
TTTL= Talk to you later
IMO= in my opinion
HTH= hope this helps
Y= why?
U= You
UR= your
YW= you're welcome
NP= no problem
NA= no answer or not applicable
NM= never mind
FYI= for your information
PSP= paint shop pro
PMP= peeing my pants
PMSL= peeing myself laughing
ASAP= as soon as possible