The term used to describe the unpleasant odor of sweaty, unwashed testicles after a few days.
"Man I got to take a shower, I don't want Krissy smelling the nut funk"
by Matt December 05, 2003
1 more definition
extremely foul smell from the bottom of the testes which results from streneous exercise, physical activity or yo nazzty ass hasnt bathed in a few
damn yo, you got sum nazzty nut funk, dawg
by jaime April 02, 2004