Top Definition
noun: what a meth addict grows to cover his bad teeth.
Bob, during an 11-day crank binge, grew a feeble methstache to try and hide his severe and irreversible dental decay.
by Drewsky and McFamous October 24, 2009
Someone that has a similar facial hair to Walter White from Breaking Bad.
Person 1 "Yesterday I saw a guy with the same mustache as Walter White."
Person 2 "Then he had a methstache."
by ThatOneCoolCat August 11, 2014
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