The two part act of sucking semen out of the anus with a straw while maintaining enough of a vacuum to get the greasy, and sometimes chunky duckbutter that runs along the taint.
Being careful not to miss a drop, and priding himself as a pro at Felching For Duckbutter, Gabe Athouse aimed his straw and inhaled every last drop of the load he left as well as the grimy, nutsack buildup.
duckbuter is an unpleasant accumulation of nut sweat, dirt, grime, and exfoliated nutsack, often experienced or produced by hours of rigorous physical activity or an extended amount of time spent sitting inside a hot vehicle. Word origionated from an un-named military individual at Damneck, VA, in the year of 2001.
"Man! That cross-country drive gave me a mean case 'o the duckbutter!"
"Man! I've accumulated enough duckbutter to garnish a bagel!"
The cumulative collection of body sweat, crotch sweat (including vajelly and smegma), ejaculate, anal seepage, and lastly, saliva, which occurs on the surface underneath a sexual encounter.
May also be found in the underwear after sexual encounter.