Incest-in-law

To fuck one's brother-in law or sister-in-law.

Ed: "Wait, Jack fucked his wife Jill's sister?"
Eddie: "Yeah he just committed incest-in-law."

by The Elias June 2, 2016

Polybius’s law

“Polybius’s law” states that if a YouTube comment section has at least 5k comments, there will always be an argument.
Because internet.

(Law Created by Polybius_223_YT on the YouYube Comment Section of an Alan Becker video. The "reacting to captions" video. You can go there to find the source in it's purest form. No that is not me by the way, I'm just spreading it.)

"Ah shit! There's another argument.."
"It's Polybius’s law, Of course there'd be an argument"

by Blooperomg September 1, 2021

Checkoway's law

The law states, "Whenever anyone tries to correct another's spelling, grammar, or punctuation online, he invariably screws up his own."

An example of Checkoway's law in action:
A: The woman that sings in the band is great.
B: You mean "The woman _who_ sings in the band is great." Learn some english grammer!!

by lurn ur grammer August 4, 2008

Cathy’s Law

The fundamental law of nature that you will always crave Chick-Fil-A most on Sundays when it’s closed, leading to inevitable disappointment.

The phenomenon is named after the late, great Chick-Fil-A founder, S. Truett Cathy.

Last Sunday, I got fucked by Cathy’s Law again. This time I got all the way to Chick-Fil-A and pulled on the locked door before realizing what day it was. I was devastated.

by Greg Taylor July 1, 2018

Twitter In Law

A Twitter In Law is a person you are following/followed by just because they are following/followed by your friend.

"I didn't know you're friends with Steve"

"I don't really know him that well, He's my Twitter In Law"

by 54M3E5T February 6, 2017

Cousin-in-law

My cousins spouse.

My cousin John’s wife, Jane is my cousin-in-law.

by Blacktears80 September 16, 2018

Jill's Law

The phenomena named after a young woman who can't make sense of her actions, the law describes anything that doesn't make sense.

"dude why is my wifi lagging it worked literally 5 min ago"
"Jill's law man"
"Ah you right"

by NoEnd February 12, 2021