The arm rule

A way to know if you need a condom size bigger than medium. By measuring your penis to your arm, if it's bigger then you need a bigger size.

Hey dad what size condom should I wear? You should use the arm rule. Oh ok

by Lee Chandler May 26, 2017

offside rule

Something every guy will ask you to define when a girl will tell them they like football.

Amanda: i like football too!!
Bryton, willy and chad in unison: OH YEAH? tell us what the offside rule is then...
Amanda: leaves

by Yeri♡ May 13, 2023

Hidden Rule 101

Hidden rule 101: Only newfags refer to rule 25.

Person A "that doesn't make any sense..."
Person B "yes it does!"
Person A "...rule 25"
Person B "you dumbshit only newfags use rule 25"
Person A "whatever"
Person B "yeah its hidden rule 101"
Person A "fuck you"

by abomb_01 February 27, 2010

bella rules

A person who is amazing at everything except for losing

Him: Your good at that
Her: Yeah I'm like a Bella Rules

by FoodLover22 June 15, 2020

Mark's Rule

the combination of Elimination Method and Cramer's Rule

I will use Mark's rule on my math exam.

by selena7896 February 23, 2023

Rule 87

If is exists, there’s a FNAF fan game for it.

Person 1: I wish people understood my irrational fear of Spongebob :( There’s no horror games about him :(
Person 2: Well, Rule 87, bro. There’s a FNAF fan game for it.

by chxryz August 21, 2025

Rule 34M

If it exists, there's meme of it

Jeff:"is there a meme about me?"
Bill:"rule 34M"

by Chick repeller May 6, 2021