Top Definition
When a girl and/or mature women couldn't possibly give you a boner. Usually mentioned amongst men who are discussing wether they would engage in sexual relations with a woman or not.
Person 1: Dude, what do you think of Mrs. Moreland? I bet she's a cougar.

Person 2: Dunno bro, I don't think I could handle that bitch. She's unbonable for me
by FracklestickMan July 15, 2010
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