when you have violent anal sex with a someone as though you were in jail. this is usually done without consent and without a condom. it often involves the transmission of STDS especially HIV
once Ndu walked into cell block D, he knew he was going to get it penitentiary style -- now he has AIDS;

at the rape party, everyone was getting it penitentiary style
by evillestdude May 06, 2009
5 Words related to penitentiary style

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