22. rip – rest in peace
wtf – what the fuck
omg – oh my god!
faq – frequently asked questions
lol – laughing out loud
afk – away from keyboard
asap – as soon as possible
plz – please
cuz – because
thx– thank you
fyi – for your information
gratz– congratulations
gm – good morning
gn– good night
hf – have fun
os – operating system
m/f – male or female
msg – message
mms – multimedia message service
np – no problem
sry – sorry
sec - second
tos – terms of service
tc – take care
u – you