something that is so funny it can only be described as hifuckinlarious

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.

a variation of "hilarious" with the word "fuckin" thrown into the middle to add emphasis.