also known as the taint, the duck butter brewery is the land that sits between a person's brown eye and ball sack. It naturally produces duck butter.

duck butter is the nasty film of sweat and someother shit that builds up in a man's taint (space between balls and asshole). it got it's term because that shit is thick like butter

the name of a product, used in the lubrication and assembly of hub and spigot pipe. applied to the inside of a gasket that has been placed inside of a hub end and on the outside of the spigot end prior to joining to ease the process along. duck butter itself is comprised of water soluble vegetable shortening.

The combination of sweat from the penis/scrodom area, and the anus. These two meet on the gouch and form a deadly serum called Duck Butter.

REAL DEFINITION: It is the creamy peanut-butter like substance that is produced from anal sex with a partner who forgot to clear the shoot in advance. The "churning" of the "butter" creates a quacking sound. Hence: Duck Butter.

When, during a fight ( play or real), one person reaches down their pants and retrieves and copius amount of duck butter, then bitch slaps the other person in the argument. Not only did you just get slapped, but SURPRISE, now your face smells like duck butter.

A film in your ass thats so thick you can spread it like butter