When you stick one testacle into a girls ass, and one into their vagina.
"John gave Sally a Double Nut Split, and I dont mean the ice cream"
by T-Money and Joey P January 9, 2007
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When two men are engaging in anal sex, and the man who's inserting his penis' balls slap against the other man's anus, to an extent where a fudge-like coating of feces over both nuts is created.

Also, a kind of coffee.
"We were going at it so hard I had a double nut fudge"

or

"Are you going to have the double nut fudge, or try the Brooklyn brew?"
by xylobone November 9, 2009
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A sex position involving a bear, a chair, a man, and a tree.
I am going to go and mammoth double nut brown that tree.
by tummy12359382262 October 15, 2011
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Two wrestlers missing a low-blow simultaneously, as seen in THQ's WWF Wrestlemania 2000, and WWF No Mercy for the N64. This is achieved by a recovering character holding the the down pose and coming up with a low-blow while the standing character strong-strikes a low-blow of his own. The result is a double 'whooshing' sound and they both punch the air, no one hit. Normally, when one lands the low-blow, a "PING!" sound is heard. The fore mentioned maneuver cancels the "ping".
:: Two players go for the low-blow ::

one says: "AWW! The double nut-ping cancellation!"
by OperatorTX 13 August 29, 2009
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When you are jacking off while laying on your bed, quickly stand up on your bed before you're going to nut and aim at the floor.
Kid: When was the last time you nutted?
Kid 2: Yesterday. I tried the Double Decker Nut it was awesome!
by niganigga97 January 14, 2020
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When you jump and then nut to jump higher

Similar to double jumping in Mario but you nut instead
Kid 1: yo our ball is stuck up on the roof
Kid 2: I got got you all I have to do is double jump nut
by Crill March 9, 2020
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