Top definition
Someone who is the odd man out. And is usually displaying strange behavior. Often he is a fag.
1. Wow that new kid Joe is weird huh? What a buttknuckler 2. You ruin everything, don't be such a buttknuckler.
by SourSack Attack July 11, 2010
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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