Definitions by PigInADollHouse

Pony Up 

1. Basically, to engage in sexual intercourse, but particularly if one is in the "cowgirl" position.
2. Pay up.
3. Another term for lesbian sex in the cowgirl position.

Guy: Pony up babe.
Girl: *climbs on*

Pony Up by PigInADollHouse February 17, 2010