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1.
A thin, gross-looking peach fuzz, (usually male pubescent) attempt at a moustache. Adam Morrison has a huge grubstache.
Bob: "Look at Adam Morrison, he's such a good basketball player."

Mike: "Yeah, but he has a fucking huge grubstache."
by Max Cekota November 24, 2008

Words related to grubstache

beard facial hair moustache mustache 'stache