Greeting common among cyclists passing each other on the road. If you're biking along and can't give a proper "Hello and good day", you can just give someone a biker's nod. It also says "I acknowledge that I am one of your biking cohorts. We sure are a superior group of folk."

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.