To ram or punch asses together in an synchronous motion, and moaning like a dead fish
mike smith got caught ass jousting with a black kid from georgia
When two males put on helmets and one runs full speed at the other with the hopes of getting his dong in the others ass. A less fun version involves a male and female. Also referred to as lanceless jousting, it was common in the medieval times before man invented horses.
Dude: Hey Ben I've been craving some ass jousting for the past couple weeks how bout you?
Ben: Me too my butt's felt way too tight recently, how does tonight sound?