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Being a person who places the interests of his friends as last priority. To lie, cheat, or act in a decietful manner towards your best friends or bros. The opposite of a true bro.
It must be fake bro February because all my friends are ditching me off.

Eugineo told everyone he was going to his grandmas birthday but really he went to the casino, what a fake bro!
by Fakebrofebruary February 04, 2011