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
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!