Top definition
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 03, 2008
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Apr 26 Word of the Day
1. The default beliefs installed when you were a child.

2. An unexamined position you absorbed from your environment growing up.
I grew up in a conservative home so my factory settings lead me to vote Republican.
I grew up in a liberal home so my factory settings lead me to vote Democrat.
by riemannslost0 February 04, 2020
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2
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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3
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 28, 2017
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4
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 18, 2021
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