To injure oneself in a gruesome manner in which the testicles are crushed and/or have much pressure applied. It is common for all onlookers to burst into spontaneous fits of malicious laughter.
Rack (verb): To strike a male in the groin, specifically in the testicles. Despite the highly painful results, the term 'rack' generally expresses playful, friendly, or prankish intentions. Though its origins are unknown, it is suspected to have grown from the common billiards term, to rack ("rack up") the balls for the striker.
"Jon stole my last soda, but I racked him, so it all evened out."
"The golf ball ricocheted off the tree and racked Frank, causing him to keel over in the midst of his laughing friends."
To sleep. Usually referring to sleeping in an inappropriate place, such as in school, on the floor, during a movie, etc., but can be used to describe any sleeping situation.
"How did that movie end? I was racked the whole time."
"I'm exhausted. I'm going to go home and rack."
"Everyone check out Sam, he's racked on the ground right now."
Johnny:"hey dude your sister has a nice rack. Mind if I cop a feel"
Xavier"wait a minute I'll just go ask her..."
(2 minutes later)
Johnny: dude, what did she say?
Xavier: (plunging a kitchen knife into Johnny's left eye socket) she said I should stab you in the eye, you fuckin pervert! DIE YOU FUCKEN DOG CUNT!!!
Johnny: Arrrghhh....uunhh... (gurgle)