When you cheat on your wife the mistress is the slut on the side.
Bob: Hey George, where are you going.
George: I'm going to see my slut on the side.
Bob: Huh? What's that?
George: You know when you're having an affair.
Bob: Oh I get it.
Bob: Wait you're cheating on your wife.
George: UHHH UHHHHHHHH MMM no?
Bob: Well I'm going to post this on facebook, and twitter.
George: No don't do that.
Bob: Trust me you're wife will understand.
George: What do you mean?
Bob: You're wife is my slut on the side.
by thuffman June 17, 2012
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A person that you thought was your side piece. But it’s now your friends side piece. But you’re still getting a piece.
When Kyle (side slut) comes over to play every Friday. But then Garrett steals him away and you (side slut of the side slut) only get to play with Kyle when Garrett’s done playing with him
by Cocaine Keltz December 2, 2022
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