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!"