You guys are wrong, its when a man and a woman engage in anal sex, then the man takes his penis and rubs it on the girls upper lip leaving a moustache. > After having anal sex, the man gave the woman a dirty sanchez.
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n pasta somewhat resembling little moustaches
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n a large bushy moustache (with hair growing sometimes down the sides of the mouth)
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plural of moustachio n a large bushy moustache (with hair growing sometimes down the sides of the mouth)