Top Definition
To masturbate in the back of class....while class is in session.
Person 1: "Dude did you see what Dan was doing in class?"
Person 2: "What?"
Person 1: "He was totally pulling a Renish during class"
Person 2: "Did he use lotion?"
Person 1: "IN CLASS!!!"
by that_itch_you_get April 17, 2012
1 more definition
To Renish, is to masturbate in school, in a classroom full of people.
Tom Cruise pulled a Renish in class today, and is very proud of it.
by The Brownie April 17, 2012

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