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Nut sludge is the build up of jizz in the gonads, and must be gotten rid of as soon as possible.

Best to leave relatives out if it.
"I got nut sludge, Mommy," said Big Jimmy.

"Let me take care of that, honey," she said, dropping his pants, and putting her lips around his trouser python.
by scodder June 27, 2010
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2
That cheesy, sweaty buildup between the scrotum and high inner thigh. Used as a derogatory term.
Shut your stupid face, Nut Sludge!
by BRAVOMAXXX May 13, 2011
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3
The creamy stuff left around the base of the penis and on the scrotem after sex.Usualy describing the morning after results with no shower.
this nut sludge is making me itch
by stribo April 10, 2007
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