When a male motorcyclist hits the brakes harder or more frequently than he should in order to have his female passenger thrust her womanhood into his back. Otherwise known as a cheap thrill.

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 build up of dust and dirt between the boobs.