The theory stating that if a girl feels comfortable talking about her period to a guy of whom she has no intimate relationship, said guy will not be able to smash.
"Yo Cindy talked to me about her period yesterday" says Sam. "According to the period theory that means you won't be able to smash" says Neal
by Fancy Tampon September 15, 2015

The theory that states; if a large mass of Africans are in one area at a given time the mass is so excessive that not even a white can escape from it's colossal force.
Boy 1: I'm on my way to your house. What street do you live on?
Boy 2: Well, you have to take MLK blvd to get there, but I'll tell you from there.
Boy 1: Turning around. Holy Shit...
Boy 2: Wait... Are you serious?
Boy 1: Yeah dude. No offense, but too many of 'your people' in one area can cause me to disappear off the face of the Earth. Have you never heard of The Blackhole Theory?!
Boy 2: Das Racist.
Boy 2: Well, you have to take MLK blvd to get there, but I'll tell you from there.
Boy 1: Turning around. Holy Shit...
Boy 2: Wait... Are you serious?
Boy 1: Yeah dude. No offense, but too many of 'your people' in one area can cause me to disappear off the face of the Earth. Have you never heard of The Blackhole Theory?!
Boy 2: Das Racist.
by Their Savior January 16, 2012

The theory that if a girl likes marmite, she swallow after giving a blow job, and if she doesn't like marmite she'll spit.
'So I was getting head from Mary last night, but she doesn't like marmite so the end was a real buzz kill. Damn the marmite theory!'
by Joeh! January 3, 2013

1.The Theory(or fact which every you prefer) That All Younger Men Like Cougars and All Cougars Love Younger Men.
2.That All Women Are Cougars At Heart.
3.That Cougars Are The Best Lovers, More Affectionate, Non Players Of Games, And Know How to Make Their Cubs Happy.
4. That Everything Leads to Or Is Done Because Of Cougars.
2.That All Women Are Cougars At Heart.
3.That Cougars Are The Best Lovers, More Affectionate, Non Players Of Games, And Know How to Make Their Cubs Happy.
4. That Everything Leads to Or Is Done Because Of Cougars.
Guy 1 Hey Do You Like My New Car?
Guy 2 Wow Did You Get It As A Graduation Gift?
Guy 1 Well That And Because The Cougars Love It!
Guy 2 Another Example Of The Theory of Cougartivity.
Guy 1 That Is Right, I Love Cougars.
Guy 2 Wow Did You Get It As A Graduation Gift?
Guy 1 Well That And Because The Cougars Love It!
Guy 2 Another Example Of The Theory of Cougartivity.
Guy 1 That Is Right, I Love Cougars.
by The Cougar Hunter of Las Vegas October 13, 2013

A socio-economic theory named by the character Captain Samuel Vimes in Terry Pratchet's novel "Men at Arms." The boots theory suggests that wealthy individuals end up spending less money in the long run compared to poorer individuals due to the wealthy being able to invest in high-quality products that last for several years or more, whereas the impoverished must subsist on cheaper, low-quality versions of the same items that only last for a short period of time before needing to be replaced.
"My rich friend is able to buy a pair of boots that cost me two months' salary, and they'll last him forever. I'm stuck buying crappy knock-offs that wear out after only a few weeks. That's boots theory in practice right there."
by AOmundson January 29, 2022

A discount code for literally anything you could ever think of; from Groceries, Concert Tickets, Crack or even OnlyFans pages. This code works especially well in the Epic Games Store/ Fortnite Item Shop.
"Hey man, I've been feeling really shitty and I think I'm dying!"
"No worries dude! I'll take you to the Epic Games Store to use code theory and cure your lack of V-Bucks!"
"Wow thanks! I'm already feeling better."
"No worries dude! I'll take you to the Epic Games Store to use code theory and cure your lack of V-Bucks!"
"Wow thanks! I'm already feeling better."
by TheoryGod October 10, 2019

CANCpiracy theory: The Internet memes and claims of people that there are dozens of cures for Cancer but governments/companies conspire to keep them hidden. Coined by media personality and writer Imran Anwar in writing about these claims.
"If there are dozens of cures of cancer, as the cancpiracy theory believers / cancpiracy theorists claim, they must obviously be from different companies and countries."
by IMRAN.TV July 29, 2014
