Top Definition
To have doggy style sex with your partner as if riding a horse.
Not sexuality specific, strap-ons acceptable
Spanking is also not only acceptable but encouraged
Seabiscuit refers to the horse-racing film starring Tobey Maguire
Jack: How did you get on with Sally last night?
Dave: It was awesome, I managed to ride her like Seabiscuit!!
Jack gives Dave a high five
by youngybuh March 28, 2008

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