A wannabe popstar who doesn't have much talent.
Diana: "Have you heard about (insert music artist here)?"

Yvonne: "Oh joy, another poopstar to stink up the music industry!"
by Thora Rogers April 23, 2006
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An anus, as it resembles a star and is used to defacate.
I was checkin' out this stripper, and she winked at me with her poopstar
by slickster September 18, 2003
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When you butthole is so tight you poop out lil star shaped turds
man after She went up there with the icicle I made poopstars for a week !
by Shiskaboom April 9, 2010
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