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Insulting description of a person whose condition is "full of shit" because his or her ass points inward, directing excrement there.
I don't care what Erika says, I know that Pierre didn't give her a Cincinatti brown out last night, she is such a rectal inversion.

Khrystal's pimp called her a rectal inversion when she insisted that she only made $40 last night.
by mr pinky June 02, 2007
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