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1 definition by Mangina4u

 
1.
1. internet shorthand usually meaning 'covering my mouth giggling'. Often used in online multiplayer games to suggest that comeback was extremely funny.

Taking the gayness of aol short-hand to an all new level
Player A: stfu noob
Player B: I did your sister

Player C: cmmg
by Mangina4u October 14, 2005