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Generally accepted internet rule that states that pornography or sexually related material exists for any conceivable subject.

Additionally it is accepted that the rule itself has limitations and you cannot be too specific on the content of the item in question.

Most commonly used on various message boards for various reasons, from humor to cruelty.
I invoke rule 34 on the Rescue Rangers. What have I done.
by Nukeitall March 30, 2006
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If it exists, there is porn of it.
I posted a picture on /b/. I rule 34'd it. Dear God.
by Captain Jean Luc Picard October 29, 2006
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/ryool-thər'-tee-fohr/ n., pl. Rules 34 - The 34th rule of the Internet, which states that any object, character, or media franchise imaginable has porn associated with it. The only exception to this rule is outlined in Rule 35.

v., p.t. Rule 34'd - To make an object, character, or media franchise comply with Rule 34.
Rule 34 even applies to Magnemite.

In 10 years, the younger fans of My Little Pony: Friendship is Magic will discover that their favorite characters have been Rule 34'd.
by PikalaxALT August 15, 2011
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Rule 34: If it exists, there is porn of it. No exceptions.
Can I get sum Rule 34 on Captain Planet?
by Ninja337 January 05, 2007
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There is porn of it, no exceptions. It is an internet based "rule" derived from a set of generalizations about things you will find on the internet, this one basically referring to how no movie, show, books, or especially children's cartoon is safe from having porn drawn of its characters. It is usually accompanied by people who claim viewing it has "raped their childhoods."
If there is no porn of it, which is of course impossible, it invokes rule35: if there is no porn of it, porn will be made.
Guy 1: There is no porn of The Lion King. It's a child's cartoon!

Guy 2: Have some rule34. *shows porn*

Guy 1: Nooo, my childhood! *cry*
by Durking July 06, 2008
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If it exsists, there is a porn of it, if there isn't there will be, there is NO exception to this rule as of now.

You cannot be 100% specific about this rule.
I saw a rule 34 of Scooby Doo - Correct.
I saw a rule 34 of Micky Mouse and Optimus Prime - Wrong.
(Please note, since I have suggested the second example, it is now being worked on by Insane Japanese Hentai Anmiation Artists)
by Abokasee June 14, 2008
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Bob: is there bird porn?
Steve: Apply rule 34
Bob: O GAWD
by ducky1998 May 09, 2012
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