To tweet -   send 140 character text message via Twitter

RT or retweet -  to forward someone else’s tweet to others (repeat)

# - marks the topic or creates a group inside your tweet that becomes searchable term

AKA -  Also Known As

ASAP - As soon as possible

B4 -  Before

B4N -  Bye For Now

BBL -  Be Back Later

BRB -  Be Right Back

EOD -  End Of Discussion

EOS -  End Of Story

F2F -  Face to Face

FYI-   For Your Information

G8 -   Great

GRT - Great

GTK -  Good to Know

IMHO - In My Humble Opinion

L8 -    Late

LOL -  Laughing Out Loud

PLZ -  Please

RIP -  Rest In Peace

THX - Thanks

TTYL - Talk To You Later

U2 -   You too

ZZZ - Bored, tired

? -   what?