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1.
A curvaceous, voluptuous, and vivacious ass, typically found on a Black female, that is inexplicably exploding from a male.
Damn, that dude has got some junk in his trunk - one fine ass boydonkadonk.
by duboiss January 05, 2009
 
2.
Another name for testicles. Inspired from the word badonkadonk, boydonkadonks are usually large in size however the term can be applied to any males' testicles - large or small.
Girl 1: This really hot guy was working out at the gym, but he needed more support.
Girl 2: What do you mean?
Girl 1: His boydonkadonks were bouncing.
by arner2344 February 01, 2010