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1.
small bit of sloppy poo that sometimes comes out with a wet fart, usually leaves a nasty skidmark in your boxers.
my missus hates it when I go out on the beer and curry, because I normally wake the next morning with my undies in a mess from wet fart nuggets.
by Nick Harvey February 13, 2004
 
2.
Reminance of a wet fart compressed into a small nugget.
Shit i thought that fart nugget was a chocolate nugget.
by Joel March 26, 2003