airplane flush
Having your balls sucked with the force of an airplane toilet ejecting poop.
"Dude, I went out with Charlotte last night and she was a freak...went down on me and gave me an airplane flush."
"Damn, what's that?"
"You know, when a girl sucks your balls so hard they're black and blue."
"Damn, what's that?"
"You know, when a girl sucks your balls so hard they're black and blue."