Rule 1.5 

Mexicans do not exist. They are a myth, like Santa, the Easter Bunny, or the Tooth Fairy. They are just something your mother tells you are real when you are little.

You will go into extreme stages of denial after reading this definition. Go seek therapy, you'll need it.

Adrian: "Hi, do you want to come to my house? You will meet my Mexican mom."

Daniel: "Rule 1.5"

Adrian: *extreme stages of denial*

Rule 1.5 by Elfdemon September 4, 2014

Rule 1.5 

Rule 1.5 is the rule that any other rule following rule 1.5 is no longer existent and doesn't apply to anything.

Rule 1 - You must follow rule 1.5
Rule 1.5
No rule
No rule
No rule

Rule 1.5 by AR!TANE October 13, 2009

Rule 1-3-5 

Always try to occupy odd-numbered urinals. Never occupy a urinal right next to another urinal currently in use. And never, EVER start a conversation with anyone if you are using a urinal and/or if the person you want to talk to is using a urinal. That would just make everything really awkward.

*Guy 1 enters bathroom, occupies urinal*
Guy 1: Hey bro, what's up?
Guy 2: WHOA WHOA WHOA MAN! RULE 1-3-5!
Guy 1: Oh shit, sorry
*Guy 1 moves urinals, pissing commences in silence*

Rule 1-3-5 by anonman123 April 17, 2010

1, 3, 5 rule

When using public bathroom, using urinals, 1, 3 and 5. No 2 and 4 just in case others come in. Never be next to another man using a urinal. Also no talking why using the bathroom.

WTF, your in 2!!
So...
1, 3, 5 rule!!!

1, 3, 5 rule by Urban Dictionary January 18, 2008

The 1.50 Rule 

A 1.50 is when a girl gives a male one dollar and fifty cents to let her suck him off and yes swallow. Otherwise known as Reverse Oral Prostitution. The rule is the definition

Damm she really gave you a good o'l 1.50

Remember The 1.50 Rule she pays you to suck you off

You 1.50 lover, you've been giving 1.50s to every Bob-Tod Jones in the county.

You'd give a 1.50 to everyone in school you slut

The 1.50 Rule by Big Daddy D (Vitamin D) February 10, 2020

Rule 15.5 

If a video game exists, there is Thomas the Tank engine of it in some form. Whether it be through the game's own features, mods, or just artwork, you are bound to find something related to Thomas the Tank engine in any game.

>"Seriously, this game just came out and already there is a mod that adds Thomas the Tank Engine?"
>"Yeah dude, that's Rule 15.5 of gaming"

Rule 15.5 by GrimoireOfMarisa November 21, 2019

Rule 15

Sex >>>>> Food > Porn > Everything else

"oh my god that girl is checking me out and she is SO HOT, but i'm going to eat a burger" FAIL(rule 15)

Rule 15 by Briick Castigliding January 27, 2009