FAT theory 

This definition is specifically related to the decks and presentations used in corporate, government and other sectors.

FAT is an acronym for:
Flowful(F)
Aesthetic(A)
Thorough(T)

According to the FAT Theory : A good deck should have these 3 elements. For eg: The various individual slides should be in a flow communicating a bigger picture. The deck should be aesthetic, more visual than textual. And most importantly, the data in the slides should be thorough!

Hey Dave, I want that deck based on FAT Theory
This is such a FAT Presentation/Deck
That was FATistic

FAT theory by 27weeks March 3, 2021

Conservation of Fat Theory 

The total amount of fat in the world stays constant over time. Fat can never be created or destroyed, only gained or lost. When one person gains weight, another loses it, and vice versa.

Julia seems to be shedding off the pounds whereas Lois is now sporting some thunder thighs- it must be because of the Conservation of Fat Theory.

Conservation of Fat Theory by siosays July 19, 2011

Fat max theory 

The theory that any individual can only absorb a certain amount a fat within a given time span. Therefore, once a person has reached their 'fat max' they will be able to continue gorging themselves without any further detrimental consequence.

After eating a full order of mozzarella sticks, potato skins, and spinach dip at TGI Friday's, Sara, an avid supporter of the fat max theory, realized that she had most likely reached her fat max for the night and therefore felt completely guilt-free when she ordered the cheesecake.

Fat max theory by Bubblegoose09 May 3, 2011

fat friend theory

the theory that states all hot chicks have a fat friend. also see wingman

the fat friend theory is almost always true.

fat friend theory by jmobley October 5, 2006

fat midget theory 

When all a guy does is go out with fat small girls. Its like he has no standards and thinks that small fat girls are attractive...

Guy1: hey im goin out with sara
Guy2: dude shes fat and shes tiny
Guy1: .....
Guy2: didnt you go out with jane a while ago...??
Guy1: yeah why
Guy2: go look up the fat midget theory dude...

fat midget theory by bellend_to_the_end October 1, 2010

Fat Tails Theory

The theory, central to Taleb's critique of standard statistics, that many real-world distributions have "fat tails"—extreme events are much more likely than the normal distribution predicts. In a normal distribution, extreme events are virtually impossible; in fat-tailed distributions, they happen regularly. Financial markets, pandemics, wars—all are fat-tailed. Fat Tails Theory argues that we have been using the wrong statistical tools, underestimating risk, pretending the world is safer than it is. The theory explains why Black Swans are not as rare as we think: they're rare in thin-tailed distributions, normal in fat-tailed ones. Fat Tails is the mathematics of humility, the quantification of our ignorance, the proof that we live in a world where the improbable happens—and we'd better be ready.

Example: "His risk models assumed normal distribution, so extreme events were virtually impossible. Then the crash came—a fat-tail event, impossible in his model, inevitable in reality. Fat Tails Theory had warned him: the world is not normal; extremes happen. He'd ignored it. His models were precise and wrong."

Fat Tails Theory by Dumu The Void March 7, 2026

Critical fat-cock theory 

This only thing you WON'T steal and promulgate.

Hym "Nobody else thinks that's weird? They'll steal EVERYTHING BUT critical fat-cock theory! That isn't weird to anyone else? God, I think it's weird. Don't you? Critical fat-cock theory! The ultimate theory! So profound it terrifies scholars and charlatans alike."

Critical fat-cock theory by Hym Iam April 22, 2024