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When a man starts growing a beard after a traumatic event (usually a breakup possibly a death) and continues to grow said beard until he's done grieving (read: rebound).

Sometimes this can be counterproductive since some dudes look like a serial rapist when they grow a beard, thus lengthening the grieving process and the beard.
Good thing Drew hoooked up with another chick so soon or else his grief beard would've looked like Al Gore's after the 2000 election.
by ThinkingMan January 12, 2009
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