a person who has mutch fiber in their poop.
Matt: I love to eat grain
BOB: Matt ur A POOP MUFFIN!
by robert moseltof May 3, 2008
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A way to describe someone who is good but also bad, or just having extremely good luck.
Oh look at him he’s so lucky what a poop muffin
by Yes it was January 19, 2021
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A sweet, mushy, and slightly sticky brown delicacy found only in San Fernando, Chile. Alternate definition: a mild swear word used primarily in Germany and the Western United States
Any fresh poop-muffins available today, Margaret?

Oh Janice, stop being such a poop-muffin!
by poop muffin lovers May 8, 2018
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A word used to describe someone who is cute but who doesn’t like being complimented.
Cody called Kate a Poop Muffin to when she looked cute.
by OutsideDaveDaGhost August 27, 2019
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Butt cheeks...those sweet cheeks you wanna eat!!
Dayum did you see her poop muffin?!

I’d lick that sweet poop muffin!!!
I just wanna bury my face in her poop muffin!!!
by Stave1 September 29, 2017
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