When a girls pubic hair grows so long that it gains consciousness and proceeds to attack the owner

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 term Pube Monster is used in association with a shower or general plug hole which is filled with wiry hair most likely from from the pubic region of a large beast/monster. While the likelihood of a beast/monster taking a shower in your house is slim, the sheer mass of hair plugging the hole strongly points in the direction of this....or a person who needs to shave their bush.