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The anus/rectum. Otherwise known as "asshole".
"Suzie let me put it in her stank bank last night!"

"Awesome!"
by bluescythe3 April 24, 2009
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2
Making a withdrawl from the booty and then making a deposit in the vagina.
Her anus was too loose so I stank banked it back to the love box.
by MasterJRC January 18, 2008
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3
You don't want to know. BUT. If you must... A stank bank is a place you go to store unwanted memories of molestation in your childhood.
"Dude that story sucks. You should go to the stank bank with that one!"

"I'm going to see a therapist now. She helped me move my shit to the stank bank."
by The Scrabble King November 10, 2018
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