Top Definition
A single eyebrow, linked by hair over the nose between what in most people are two separate eyebrows. Named in honor of Burt from Sesame Street who has a unibrow!

"Bro, do you have a lawn mower?"
"No... why?"
"'Cuz you're gonna need one to trim that burtstache!"
by Himel Don March 09, 2008
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