A hilarious situation. Usually followed by "ensuing".

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.

To show something as funny, or comical, but only in a sacastic sense, or when you are laughing at your own joke

to be in a state of ecstacy; laughing uncuntrolably; see hilared.

Someone who is uniquely hilarious, a rare humor find of someone, hence the 'rarity' association.

noun, the amount that something is filled with.