ass joust

When a male and female are dancing, or grinding, and the male proceeds to get an erection, which he willingly allows to "poke," or joust into the female he is dancing with, sometimes causing awkwardness

Becky: "So I had so much fun at the club last night, did you?"

Melissa: "Well, this guy I was dancing with totally ass jousted me for like ten minutes before I pepper-sprayed his ass."