The dirtiest joke ever?

"The Aristocrats" joke is one of the oldest, crudest and most popular jokes throughout the history of comedy.

Comedian Steven Wright said once a stand-up comedian successfully performs the joke, it's as if they have garnered acceptance into the laughable world of comedy.

The joke is awesome because it's not absolute -- it can be told an infinite amount of ways.

The length of the joke can be seconds, minutes or hours long.

Details can be interchanged from comedian to comedian.

The delivery can be loud, soft, deliberate or to the point. The story is up to the comedian.

But there are some constants the joke needs in order to be worthy. The three elements the joke needs are:

1. The setup
The joke always includes a family meeting some sort of entrepreneur or agent in hopes to perform a skill. The family takes part in an act. The most popular one comes from the movie when the family gets involved in a circus routine.

2. The act
This is where the gloves come off. In describing the actions, comedians use gory, bloody, volatile descriptions to get the point across. The family usually performs incest as many sexual acts are performed within the family.

3. The punchline
The punchline always ask with the agent or manager asking the family, "what do you call yourselves?"

The family then replies by emphatically stating, "The Aristocrats!" It makes fun of the social, well-to-do social class by saying the wealthiest of all people are the dirtiest.

Below are two of the funniest clips from the 2005 film, "The Aristocrats" featuring Gilbert Gottfried and Bob Saget: