A stinkbomb-like prank, created by shitting into a
paper towel, wrapping it and twisting the ends (like a big joint). Also known as "the fart's big brother," the duck is then concealed in a hidden area, such as a hole in the wall, the back of a desk, behind a radiator, etc. The paper towel wrapper allows the duck to be stuffed into tight spaces without
getting shit on one's hands. Cleverly hidden, it may take days to discover.
"Ducking" is usually planned in advance, but it sometimes occurs spontaneously (e.g. parties). In order to maximize effectiveness, the prior night is often spent drinking cheap beer and eating
Mexican food.