What is dirty play?

When a guy's butt crack shows while he is bending over.

"Damn Brandon's Playing Dirty!"

dirty play - video

Dirty play - what is it?

The act of cutting open your ballsacks and placing the testicles in a bag and smashing it into someone else's lower groin area.

Jinkies I fucking hate Sicheng! I'm going to perform a dirty play on him!