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This is an acronym for the phrase "A Mouth Is A Mouth". It is used when getting a blow job from someone either extremely ugly or from someone of the same sex.
Hey man, I know she is butt ugly but AMIAM.
by Koma66 March 16, 2006
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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