Mr. Fister

A man who penetrates other men/women rapidly with his fist.
"Hey look, there's the legendary Mr. Fister. How was last night?"
by datindianguy10 November 24, 2016
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Mr. Sister Fister

Mr. Sister Fister is a middle aged man who puts his finger his sister’s vagina
That man looks like/is a Mr. Sister Fister
by Hepatitis A January 29, 2018
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