Top Definition
To perform a pointless, unsanitary and disturbing type of oral sex. In which the oral sexer sucks the gouche of the oral sexee.

Can be used as an insult or demand for someone who pisses you off.

Shortened to SMG (not sub-machine gun).
Yo andy get on ur knees and suck my gouche.
by Al the one and only December 24, 2005
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