Definitions by Mariam Manson

LMNO 

an expression to be used when you hear something utterly funny and makes you laugh so hard.
= laugh my nose off

sarah : did you hear that michelle's ex bf actually cheated on her with her mother? how fucking lame!

stephanie: LMNO, THAT'S PATHETIC of him.

LMNO by Mariam Manson October 5, 2008