Top Definition
The time of the year known as december, where people (mostly men) decide to grow extremely dirty mexi moustaches. The greasier, the better. Originated in the small town of Whitecourt, Alberta. Very similar to "No-Shave November."
Man 1: "Aw dude your stache is sick!"
Man 2: "Yeah man, it's duster december! Gotta grow out the mexican stache!"
Man 1: "I wish I could grow facial hair as golden as that."
Man 2" *winks*
by dusty whitecourtian. December 04, 2010

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