This is not an actual word, and it is not slang for anything. It is important that we define this word as non-existant. (Clearly therefore it must be defined in the category, sex, it doesnt exist for me)

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.