Definitions by McSteamy

seabiscuit 

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!

seabiscuit by McSteamy January 9, 2007