Top Definition
A Term to Describe Ones Ass, Usually used in a Humorous or Sexual Connotation
1.I Took it up the Poopus Last Night & Im Really Sore.
2.That Guy Needs to Get his Head Out of his Poopus.
3.I Gave her a nice Poopus Plunging & Came Really Hard.
by Mark X Kelly May 16, 2006
King Kong when high.
it was poopus vs the tyrannosaurus rex.
by CaptainHappyPants August 01, 2010
Simply put, sphincter.
"Honey, what are you doing? Stay away from the poopus!"
by Harper February 21, 2004

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