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A phrase to describe a woman who appears so filthy (in the sexual sense) that the only pertinent course of action is to have only anal sex with her. This means that vaginal sex is ruled out altogether due to the degree of filthiness that the woman exhibits.
"Look at her...thats a definite case of shitter only"

"Oh my god, did you see that one? She would get it in the shitter only"
by janitor2010 December 19, 2013
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