The nasty thick substance that forms on teeth of people who don't brush them.
Go brush your teeth, you've got a serious case of duck butter going on.
by Ibustedyou2 February 12, 2013
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Smegma: The foul, cheese-like sebacious substance that grows beneath the foreskin or beneath saggy tits.
"I picked up dat bitches titty and it looked like a duck-butter sammich.
by Vertigo1968 June 18, 2007
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Duck Butter is the gooey substance that is formed next to the ball sack and in the butt crack. This is formed by lack of hygiene, long days of arduous sweaty work, and native americans. Duck Butter is made up of oil, sweat, dirt, and sometimes cum stains. This mixture of components under the proper temperature, humidity, and friction, forms a buttery substance that leaves stringers when your balls are seperated from the inner thigh, or when you spread your butt cheeks. Colors can vary from brown, yellow, white, to an occasional green. The consistancy is that of mucas.
Person 1: "We don't have any margerine for the grilled cheese sandwhiches."

Person 2: "I only have some Duck Butter; however, we should probably not use it."
by Lost Almost August 16, 2010
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The combination of sweat from the penis/scrodom area, and the anus. These two meet on the gouch and form a deadly serum called Duck Butter.
Jee wiz Bobby! I can smell your duck butter from here!
by vegieman92 February 3, 2009
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the name of a product, used in the lubrication and assembly of hub and spigot pipe. applied to the inside of a gasket that has been placed inside of a hub end and on the outside of the spigot end prior to joining to ease the process along. duck butter itself is comprised of water soluble vegetable shortening.
pass the duck butter and grab the pry bar, we're getting this done today.
by Alpha Raptor July 21, 2008
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noun- the sweat that collects under a guy's ballsack that gives off a rank smell, much like yeast.
Man, this duck butter is making my balls stick to my leg!
by Kim -The Angry Dragon- February 18, 2004
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The buttery substance that forms on the gouiche of adult men, when combined with with skidmarks it forms the special "spicy" variety of Duck Butter.
Dude, I just work out for three hours, now I have some serious Duck Butter buildup.
by Douchebag4203 May 10, 2007
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