1 definition by gorgolflagnag & the wumpster

1.A nugget hanging from one's buttock that they happened to have missed when using the toilet paper.

2. also used as an insult
"John, you're such a buttnugget!"

"Ew. You have a buttnugget leftover from when you went to the bathroom, dude."
by gorgolflagnag & the wumpster February 13, 2010
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