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Abbreviation for "It's Always Sunny In Philadelphia", a hit show on the FX network.
Guy1: Hey, did you see that episode of "IASIP" last night?
Guy2: Yeah, that show's kickass!
by Julia Dawn August 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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