Rule 34 

Rule 34 of the internet. This is the most infamous unwritten rule. It states that any famous object (both physical and non-physical), topic, fandom, or person has a pornographic counterpart.

In other words: "If it exists, there is porn of it."

Person 1: Do you think minecraft porn exists?
Person 2: Remember rule 34? Of course it does!
Person 1: Should I look it up?
Entire Room: NO.

Rule 34 by That_Nerd22 July 24, 2018

Rule 34 

Rule 34 if it exists there is porn of it

Steve:there is no way that pokemon porn exists

Bob:oh yeah "searches up pokemon porn"

Steve:Nononono

Bob:Told ya its because of rule 34

Rule 34 by Stormaggedon606 October 13, 2018

ruleet 

Ruleet - a typicly used misspelled version of roulette.
Ruleet is also used in bible of page 369:

"Ruleet that we praise, will get back to us."

Retard: Yo wanna play ruleet?
You: The fuck you say to me?

ruleet by Dodz6983 March 8, 2019

Rule 8424-B 

There is a rule for almost every number from 1 to 1000 on the Urban Dictionary, most rules for each number being completely different.

Person 1: "Dude have you seen rule 87 on urban dictionary?"
Person 2: "Rule 8424-B"
Person 2: " Which completely different definition for this number do you want?"
Person 1: "The third one."

Rule 8424-B by H4ZZ4_ March 10, 2020

Rule Meglovania 

Rule Meglovania -

It's the rule that at some point every song will get a meglovania remix at some point

Remember rule34?,

now there is rule Meglovania about that every song will eventually be remixed with meglovania

Rule Meglovania by Richard Gaming May 13, 2020

Rule 90 

If a song exists, there must also exist a trap remix of said song. Rule 91

Dude 1: "God I wish this song had a sick drum beat behind it."
Dude 2: "Hey man, Rule 90."
Dude 1: "Awesome."

Rule 90 by Intergalactic crackwhore July 9, 2020

Rule 34 

the thing that ruined jaiden animations fanart

Me: Let's look at Jaiden Animations fanart.
3 Hours Later
Me: Why was there a lot of rule 34?!

Rule 34 by OYStookyMan87 November 4, 2020