An innuendo used to describe the T H I C C posterior of the mother of your own mother/father. More specifically, when it is old and smells peculiar like an old cheese wheel.

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.