Its when you respond to either irony or sarcasm with more irony or sarcasm, respectively. More commonly referred to as “playing along.” Double humor, however is more specific than playing along because it may be without the knowledge or consent of one or more parties involved in the “double joke.”

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.