1 definition by qqqqqq

Top Definition
An internet abbreviation which stands for You Make Me Pee Myself. It is used similiarly to LMAO and ROFL (in situations where something funny has been said).
IM User1: So I says, it's a bit of grit! Lol!
IM User2: OMG! YMMPM!
by qqqqqq January 20, 2007

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