To wreck, or fuck something up. Doing a horrible job on something.
Man you bonanged my car, its falling apart!
by Mike W Anarchy November 26, 2007
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a really really reallly fat person that can't sit on a desk without falling off it
holy shit look at that bonang she can't even sit on that damn desk
by Killjoy123 October 21, 2007
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