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a mustache that is so ingrained with white trash DNA, it grows in weak, with only a small number of thin hairs as compared to a normal mustache. I.E.-Cletus the slack-jawwed yokel has a crustache.
Like my crustache?
by Bizarrett February 04, 2003
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2
The pathetic looking prepubescent mustache sported by boy bands and male high school students intended to impress women, while drawing only jeers and snickers. See peach fuzz.
Zach's dad finally made him Nair his crustache, he looked like a queer!
by BFish December 11, 2002
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3
(n) When a man ejaculates on another man's mustache and then doesn't clean it off, alowing it to dry.
man 1: "Gee wiz it sure is a boring day with nothing ta do."
man 2: "Sure is...Yo dude I know what we can do. Why don't I give you a crustache?"
man 1: "I don't see why not!"
by Ostangspagootti May 18, 2016
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4
A poorly grown mustache that accurs from lack of motivation to shave.

Also present on boys entering puberty. In which case it is grown to the fullest extent and shown off to there peers.
"dude did see tommy's crustache it totally awesome." "i cant wait for mine to grow in."

"hes kinda cute but whats with the crustache."

"nice crustashe lazy ass."
by hexnfx August 05, 2009
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5
A crusty, messy, weird looking mustache.
Mustaches that have lint and crumbs in them.
Guy 1: "See that geezer over there?"
Guy 2: "Yeah, what about him?"
Guy 1: "See all those crumbs in his mustache? Now that, my friend, is a crustache."
by ยปAJHยซ July 19, 2010
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6
A "moustache" of dried blood and snot, often peppered with boogers. Worn mainly by children under five years.
"Hollis! You are not going to church wearing a crustache!"
by "Sweet" Chubby July 07, 2006
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7
A term invented by Bobby Veto to describe the dried remnants left in a mustache after you've performed oral sex on a woman. A crusty mustache.
I had to put Saran wrap on my upper-lip before I took a shower so it wouldn't ruin my crustache.
by Porgy McDuffin June 25, 2007
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