1. A slang term for a mental institution, apparently completely made up and never used by anyone else but the author of "Go Ask Alice."
2. An album by comedian Paul F. Tompkins where he explains as much.

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.