It's when a women vigina is able to get very wet

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.

The heavy and powerful flow of a female's natural juices that allows her vagina to become very moist internally and externally.