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Someone who fails epically at a simple task, or is just a complete douche bag. Derived from football players that fling their chin strap off after an epic fail.
Joe: HAHAHA! Jeremy, Did you see Bob try to but that hottie at the bar a martini then spill it all over her...

Jeremy: That's because Bob's a F'n chin strapper.
by jacspaid March 24, 2011
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