JK  just kidding开玩笑

LMAO   laughing my ass off笑死

RUOK  are you ok你还好吗

NP  no problem没问题

WRU  where are you你在哪

ASAP  as soon as possible越快越好

BFF  best friend forever死党

FYI/FYR  for your information / for your reference供参考

AFAIK  as far as I know据我所知

BBS  be back soon很快回来

DAE  Does anyone else…还有人……吗？

IIRC  if I recall/remember correctly如果我没记错

IMO  in my opinion我认为

TTYL  talk to you later回头聊

SITD  still in the dark不清楚、不知道

TIL  today I learn今天学到了

GR8  Great赞！

TMI  too much information不用说这么多

GTG  gotta go要下线了

B4N  bye for now再见

ILY  I love you我爱你