by Artist mercurial December 12, 2019

When two (ugly) people (male&female) have sex, and a gelatin/butter substance is made between the two of them. Usually disgusting and smelly, and leaves a snail trail like substance on sheets. If they do not separate, the duck butter will harden and cause trouble for the both of them.
"Ewww, they are going to make Duck Butter together"
"They are so ugly they make duk butter, when they have sex." - A random uncle.
"Lets go make some duck butter!"
"They are so ugly they make duk butter, when they have sex." - A random uncle.
"Lets go make some duck butter!"
by Sai R. March 29, 2016

The sweat of a mans tant that of ball an butthole meet ,if left unclean makes a grey pudding in tant area.
by its300 March 10, 2016

by Yazza12 November 16, 2018

The sweat right between a mans testicle sac and leg that has condensed and gathered lint, hair, dirt etc... Usually the stinkiest/manliest part of the mans body. Although it is gross, women will always be attracted to it.
by chaka430 March 10, 2015

A juicy gurgling, squirtling, greasy fart, the kind you need to check your drawers after releasing, to make sure it was ONLY a fart. The sound of this type of fart is similar to an octave on a trombone.
by Vonda December 14, 2008

‘Duck Butter’ is the greasy, sweaty residue that builds up between the nutsack and inner thigh whilst wearing chest waders all day during 25+degrees on summer wildfowling hunt.
“Bloody hell Bob, that was a tough day out on the marsh, the old ‘duck butter’ is kicking up a bit.”
by Master Baiter 1972 June 19, 2021
