A good friend that acts like he is a bro but is actually a poser; A mix of the two words "bro" and "donk"
Rachel: Bro, these waves are bitchen!

J-Bo: Hey Rach, you just learned how to surf. Stop trying to act like a surfer brah.

M-Unit: ugh what a brodonk.

Rachel: Bummer...
by JamBono April 20, 2011
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