Top Definition
Mmm Smash; is to smash the pelvis on the final thrust during sex the male must smash his penis into the girl as hard and far as he can to shatter, crack, or fracture the woman's pelvis, but this must be the last thrust the man cannot go in another time.
Ahh sorry hun i didn't mean to Mmm Smash You let me call 911.
Man, did you here what Johnny did to Carol? No what? He Mmm Smashed her. Ouch sucks to be her.
by The PhreakShow November 29, 2009

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