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An ugly member of one's "stable" of hoes. Usually, the sea biscuit can fuck pretty well but isn't very nice to look at.
Person A: Where you goin dawg? Gonna bang yo shawty?

Person B: Nah kid. She's on the rag. I'm off to tag this sea biscuit.
by penumbra July 14, 2006
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NOUN. The act of going at it with a girl from behind (doggie style) whilst slapping her on the ass only after kicking her in the leg or arm (your preference) making her a "gimpy horse".
Fucking seabiscuits, dawg...leave your girlfriend's ass as red as her leg...HAHA!
by McSteamy January 07, 2007
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When you are fucking a chick from behind and you are about to cum you neigh like a horse nice and really loud, so as to cause some sort of confusion so that she looks back at you and then you cum in her face.
Man, you should have seen that bitches face when my seabiscuit blasted her in the face
by markey121 September 30, 2010
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When a swimmer's goggles fall off in a race, and they have to swim with their goggles in their mouth.
Poor Sara got a sea biscuit when she was swimming the 100 fly.
by DivineArtist May 14, 2017
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the act of releasing stool into a body of water and leaving it there to float
" Dude, it's way too far to the bathroom. i just dropped a sea biscuit right here. You might want to get out of here."
by akripke February 23, 2008
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When a group of salor go diveing and find 2 hobnobs then jizz in between them to make a sort of custard cream, is a delecasy among seamen.
Jimmy: Have you got any of those special Sea-biscuits
Bob: Yes fresh this afternoon.
by Azzmation November 03, 2006
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