Top Definition
A man who is very trendy, bro-like and wears a lot of flannel shirts. Also referred to as a 'trendy lumberjack'
Guy 1: Dude, check out the dude with all the chicks in his flannel.

Guy 2: Yeah, that's Frank. He's such a lumberbro.
by MuscleKitten November 28, 2010

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