Some one who fucks your mother. Also a word known for coming out of Rappers mouth's such as Lil Wayne, and T-Pain.
"Fuck land, I'm on a boat, motha' fucka (motherfucker)
Fuck trees, I climb buoys, motherfucker (motherfucker)
I'm on the deck with my boys, motherfucker (yeah)
This boat engine make noise, motherfucker" (On a Boat Lyrics)