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Nut Duster 

A small patch of hair on a mans chin. Not exactly a goatee because it's not connected to a mustache, but bigger than a soul patch. Commonly used in a derogatory manner.
Man, check out this picture of Ethan Hawke. He's sporting a bitchin' nut duster.

Michael thinks he's so cool since he grew that goofy looking nut duster. Somebody should tell him to shave.
Nut Duster by jmoney1776 March 2, 2009

Nut dusting 

The act of talcing ones nuts on hot days for comfort.
My balls are so sweaty in this heat, I should have done some serious nut dusting this morning.
Nut dusting by Murrkin June 18, 2017

Nut Duster 

A person's (hopefully a man's) goatee.
Phil is trying to grow a nut duster.
Nut Duster by Nick January 18, 2004

The Nut Duster 

When fucking a giraffe in the ass, the small tuft of hair on the end of its tail is used to gently tickle the scrotum for pleasure.
Small child:Mommy what's that dirty dirty man doing to that adolescent giraffe?
Mom:Oh don't look honey, it's just the nut duster, you'll understand when you're older.
The Nut Duster by Steveshiftyshaft January 18, 2011
When a man over the age of 60 unloads his dusty nut, a white dusty cloud appears from the penis
Dusty Nut by C1? January 3, 2009
When you nut a lot of times in a day.
I just nutted for the fourth time today, it was a dusty nut.
Dusty Nut by Alppuccino May 19, 2018