Laughing my ass off

IT Slang: Part II
Vocabulary Term #632
Adjective
US
UK
LMAO (Laughing my ass off)
US
UK
when something is so funny your buttocks may actually fall off your legs
US
UK
"John: OMG! When I was at Billy's house I caught his dad wearing a unicorn onesy! Craig: What? LMAO!"