Top Definition
The act of motorboat-ing an attractive woman's ass instead of her breasts.
"Man she's got a great ass. I'd love give her the Dirty Bayou Motorboat"

"This guy motorboated my ass last night like it was my tits and then he said something about a bayou..."
by imotorboatdownsouth March 25, 2009
5 Words related to Dirty Bayou Motorboat

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