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Suave in da boner is a group of words used to describe most often a male who is full of himself and overly cocky when he has little or no reason to be.

Very closely related to its brother the adjectives suave and debonair which are used to describe someone who is very smooth and well put together, rather classy if you will.
Lady: Man, that Frank is suave in da boner!
Small child: Yeah he thinks he's way cool.
by The Chink Chik July 22, 2010