Defining someone else name as a word (typically on Urban dictionary)to either bully them or suck up to them.
Also when a actor gets called by a character name or stage name they no longer use

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.