a mustache on any aged guy that looks like the man does not know how to shave. a mustache but not intentionally.
by curlsmcdurls November 13, 2007
Get the tweenstache mug.A portmanteau describing a teenager's moustache that ranges from faint to very noticeable, but never thick enough to look even remotely good. It remains until the person shaves for the first time.
by D_C_ August 28, 2006
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by b7239 January 26, 2013
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