Top Definition
When a woman places a single breast on the ass of a man. This will result in the most mind-blowing, ball-draining explosion of man butter ever. Boob on ass.
Mike: "Dude, I Teriyaki Phonebooked Chelsea last night."

Todd: "What the fuck are you talking about?"

Mike: "She put her boob on my ass."

Todd: "Ohhhhh. Nice, Mike."
by Bruce Bartwo August 26, 2011

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