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1.
the left over pee and or cum on the end of a dogs penis that attracts nats!
fluffy sure does have a swarm of flies after his nat butter
by fuzzy fluffy October 18, 2009
 
2.
Noun: The stinky build-up in and around a female's vagina as it scrubs together throughout the days' activites.
I fucked my bitch yesterday and I scraped away a pound of nat butter.
by PFaceBarnes_MA April 20, 2008