ROTFLMAO

ROTFLMAO

rude slang An initialism of "rolling on the floor laughing my ass off," used in text-based communication to indicate that one thinks that something is extremely funny or ridiculous. Often lower case. More commonly seen as "ROFLMAO." I just saw a monkey riding on the back of a pig! rotflmao
Farlex Dictionary of Idioms.

rolling on the floor laughing (my ass off)

and ROTFL(MAO)
phr. & comp. abb. a description of how hard someone is laughing at someone else’s comments. (Usually objectionable.) ROTFLMAO! Gee, that was funny!
See also: ass, floor, laugh, off, on, roll

ROTFLMAO

verb
See rolling on the floor laughing my ass off
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • WTG
  • HBU
  • CTFO
  • CYA
  • YKWIM
  • YMBJ
  • FTS
  • BTS
  • DYJHI
  • DYJHIW