Rule 536

Rule 536 states: "if it exists, there is a phobia of it."

Everyone is scared of something.

The number 536 comes from the year 536, which was nominated as the worst year in history to be alive.

This is the dark version of Rule 34.

Chad: "Man, I have a serious Rule 536 for spiders."

Brian: "Dude, I have a Rule 536 for green bubblegum."

Chad: "Bruuuuuuh."

Rule 536 by Dr. Drittunge February 9, 2021

rule 39

similar to rule 34, rule 39 is the internet statement that "if it exists, there is furry porn of it"

"oh you thought rule 34 was bad? try out rule 39."

rule 39 by ToniZambonii February 23, 2021

Rule 34 

A rule in the universe that is something or someone exists, it always has porn of it.

Watching DragonBall Z, thinking if Goku's gonna lose the virgin life.
*I remember Rule 34*
There is, or will be.

Rule 34 by PlayPlater July 20, 2015

Rule 621 

If it has animals, there is furry porn of it. A subset of rule 34. Named for the furry imageboard e621.

"My niece couldn't spell Ratatouille so I Googled it for her, and we accidentally found Ratatouille porn. Why, internet, why?"
"Because rule 621."

Rule 621 by laofmoonster August 30, 2013

Rule of Thumb 

The rule that basically a lot of modern women will allow a man to sneak a finger up their ass during sex, but will draw the line at full anal sex. The rule of thumb states that a thumb, being thicker than the average finger, inserted into a female's ass consensually will ultimately then mean that the consenting female will allow said male to insert his penis into her ass.

Davy and Stuart were together last night, do you know what happened? No, but apparently she failed the rule of thumb.

Davy said he's meeting Stuart tonight and won't try anything until he's found out whether Stuart passes the rule of thumb.

Rule of Thumb by PhilMujar June 2, 2014

Rule 96 

No fictitious band can possibly compare to the greatness that is Onion Dent!

Dude, Rule 96...The Monkees suck, go get the new Onion Dent!!!

Rule 96 by compustrat December 14, 2010

Rule Zero 

The customer always lies.

The customer said this happened. Dude...Remember Rule Zero!

Rule Zero by Tech Support Rep February 1, 2012