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A variation of a douchebag, a roofbag is a person who thInks they're all that, but with their large head and triangular shoulders, what they really are is a walking roofbag. Helps if the person is extremely tall.
Michael Phelps can be such a douchebag sometimes, but Ryan Lochte is the ultimate roofbag.

Man, that pointy-shouldered guy came in thInking he owned the room, but all anyone could think was what a total roofbag.
by DJ Johnny D September 01, 2017
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