Definitions by TickleMeNutsack

Trampoline 

The act of forcing a man's penis into a woman's inner cheek lining. As the cheek reaches it's maximum extension it bounces back

Jean and Rick played trampoline in the car during their lunch hour.

Trampoline by TickleMeNutsack November 12, 2010

Cincinnati Trampoline 

A variation of the trampoline, whereas the mouth of the participating female is defecated in and the male participant then proceeds to insert his penis into the inner cheek area in a trampoline fashion.

In a flash, Rick was performing the Cincinnati trampoline with Jean at the drive in theatre.

Cincinnati Trampoline by TickleMeNutsack November 12, 2010