Butt jock cock-in-a-lock
When someone's jockstrap is wiggling from their anus, and gets the strap stuck on a jammed cock lock.
"I was rushing to class when I got Butt jock cock-in-a-locked and was stuck in place until the paramedics came along."
"Did you see Angelo get butt jock cock-in-a-locked during recess?"
"Did you see Angelo get butt jock cock-in-a-locked during recess?"