Literally, "first defecation." The act of taking the first dump in a toilet since it was last cleaned, particularly at one's workplace or other public restroom. Prima cacatus typically results in a surprised sense of joy that no one else's ass has touched the seat that day.

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.