Filler word such as 'um', 'er' or 'hmm'.
Originally devised whilst under the influence. Can be used when nothing appropriate can be thought of to say.

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.