If it exists, there is porn of it. If there isn't, there will be.

Only one known exception: rule 34 itself.
1: Hey, do you know if there's any Power Rangers porn out there?
2: Rule 34.
by nsrtnmhr September 7, 2011
A rule on the internet that states "If it exists, there is porn of it."
"Rule 34 ruined my childhood :("
"No, it made your childhood sexier."
by suburbandictionary August 27, 2013
/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
An infamous internet rule that no one seems to accept. For anything on the internet that exists, someone, somewhere, somehow will find a way to sexualize that. It can go from video game characters to cartoon characters to animals to popular persons to non-human living things to non-living objects or things.
"Dude, they already made Rule 34 of Cuphead."
"Aw fuck."
by someotherkid2021 December 6, 2017
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
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
If it exists, there’s porn of it, no exceptions.

(35=If no porn found, it will be made)
Person : (Very innocent)
Some1 else: Rule 34
Some1 else: Rule 35
Person: (hopes and dreams are crushed) fuck
by RoyelPixel ._. October 16, 2018