Top Definition
the art of stuffing ones testicles into the vaginal opening while maintaining complete anal penetration. References the extremely difficult act of trying to bathe a cat in a sink." (AKA Balls in a box)
"Bro, last night I totally stuffed my nuts into this girls snot-wallet while boning her in the chocolate starfish. It was harder than keeping a cat in a sink."
by Adam Basich April 27, 2008

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