When you finger the anus a little too hard with out the knowledge they haven't douched, so when you get up you leave a poopy duck foot print on floor or bum cheek.
Me and this person got very crazy last night, I fingered the bum which was great, but didn't realise it was a fully loaded bum, when I pulled out I left the mucky duck foot prints everywhere.
The condition brought about by excessive heat and humidity, where the scrotal sack sticks to the inner thighs and upon spreading one's legs, the skin stretches, like the webbed foot of a duck... (Similar to batwing)
Females can also suffer from this condition, depending on the amount of dangling labial flesh they have. In this case, the condition is referred to as 'platypus foot'
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.