The clogage of someones asshole. May be caused by a variety of things. Also used as an insult in certain cases.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

much like a blood clot, fecal matter may clot in your ass, causing an assclot.