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A superfink is an act, performed by one friend, on another, which can include everything from not showing up to a party after promising to do so, to stealing a friend's girlfriend.
Stan: Yo man, what the hell happened to Sam? He looks like hell and I've never seen him drink that much.

Raj: Oh, didn't you hear? Sal pulled a superfink on him. Put the moves on Gretchen last week... Successfully.

Stan: Wow, Sal's a real piece of shit, and Gretchen's a whore.
by Don's Johnson August 08, 2012
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