Hoax

A hoax (plural: hoaxes) is a widely publicised falsehood created to deceive its audience with false and often astonishing information, with the either malicious or humorous intent of causing shock and interest in as many people as possible.

Some hoaxers intend to eventually unmask their representations as having been a hoax so as to expose their victims as fools; seeking some form of profit, other hoaxers hope to maintain the hoax indefinitely, so that it is only when skeptical people willing to investigate their claims publish their findings, that the hoaxers are finally revealed as such.