The act of soiling oneself while in prison to avoid becoming a cellmates sexual toy.
John went to jail, but he managed not to get raped by giving them the old prison bottom surprise.
by CookiePanda September 1, 2010
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An abused rectum that has been subject of excessive poundings. Possibly by more than one person at a time.
"Hey, I got a date with that barista!"

"Yo dude, I heard she's prison bottomed"
by Tizzletator January 3, 2016
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