Rule 37 

If the cafeteria has mint chocolate chip ice-cream, Rule 37 dictates that one must partake. NO EXCEPTIONS

A: "Oh man that was a good lunch...I am so full"
B: "Let's get out of here...But first, a sample of desserts."
A: "Not for me...too full"
B: "Oh shit! Mint Chocolate Chip! Rule 37!"
A: "Fucked"

Rule 37 by MCUNIT May 31, 2009

Rule 37 

Similar to rule 34. Rule 37 states that if it exists, there is fanfiction of it.

Dude, I found out there's fanfic about Adam Ruins Everything!
Yeah man, it's rule 37.

Rule 37 by skywriter45 May 27, 2019

Rule 37 

if it exists, there is porn of it.

Pterodactyl Dinosaur Spermo Plasmoids. Rule 37 man!

Rule 37 by mplapp January 10, 2017

37 Rule

37 Rule is exactly when Jimmy had no luck in life, no love found, no looks remained, no life stays and 37 years old is the trigger.

Hey what’s up ?

Sorry man I’m adapting to the 37 Rule from now on.

37 Rule by Jimmyhimself April 11, 2022

Rule 371 

Internet rule declaring that if it exists you can jean it. Typically done by making it out of denim or adding something made of denim then changing the first sound to J- effectively making it a portmanteau of jean and the original word.

If the words starts with a consonant sound, it is swapped for a j. A j gets added to the front if it starts with vowel. Exceptions exist.

Two examples of rule 371 in action:

His jorts are hot.

My jarger keeps my wire from fraying.

Rule 371 by Well, TOO BAD!!!!! October 2, 2016