Before doing a chick, you fish one of your roommate's used condoms from the trash, turn it inside-out, and put it on. When the chick gets pregnant, you say, "It ain't mine!"
Janice thought I got her pregnant during our one night stand, but it's probably my roommate's because I gave her the ol' Cincinnati Switcheroo.
by Coby Taylor November 27, 2007
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Using your roommate's used inside out condom during sex to fuck up two lives at once.
Yeah, man, I gave her The Cincinnati Switcheroo.

My roommate is gonna be pissed after he finds out what I gave that prostitute.
by WTF2point0 September 5, 2023
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