Skip to main content

equivalent exchange 

Humankind cannot gain anything without first giving something in return. To obtain, something of equal value must be lost. That is Alchemy's First Law of Equivalent Exchange.
"Alchemy: the science of understanding the structure of matter, breaking it down, then reconstructing it as something else. It can even make gold from lead. But alchemy is a science so it must follow the natural laws: to create, something of equal value must be lost. This is the principal of equivalent exchange. But I learned that night that some things cannot be measured on a simple scale. My brother and I knew the laws of science, of equivalent exchange. The game required sacrifice, that something had to be taken from us, but we thought there was nothing more we could loose....We were wrong."

~Edward Elric (Fullmetal Alchemist)
Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.

equivalent exchange 

Everything and anything can be reversed as long as you replaced it with something that valuable to you or someone else.
Like turning lead to gold you need lead to make something that valuable thats equivalent exchange.

Equivalent exchange. 

People cannot gain anything without sacrificing something. You must present something of equal value in order to gain something. That is the principle of equivalent exchange in alchemy.
"In the early days, we believed that to be the one truth in the world." -Alphonse Elric

Hypothesis of Equivalent Exchange

Abstract: For every lucky/unlucky event you experience, you will experience an unlucky/lucky even of similar magnitude in the future.

The Hypothesis of Equivalent Exchange is a theoritical phenomenon where, whenever something or someone experiences a lucky event, they will experience an unlucky event of similar magnitude in the near future, and vice versa.

The Hypothesis of Equivalent Exchange is connected to gambler's fallacy, where the latter is essentially an over-reliance on the former. This does not mean the Law IS gambler's fallacy; one is merely a stated hypothesis, the other is a mistake on the user's end.

The Hypothesis holds some physical value objectively. In most of society, if you do something bad to get something good (the lucky event), you will get caught and punished (the unlucky event). Additionally, going through hardship (the unlucky event) makes you work harder, thus making your future better (the lucky event). Of course, this is merely a hypothesis; inaccuracies are bound to happen.
"Did you hear how Little Timmy got into a car accident the other day? Apparently, his insurance paid him mad stacks after a bit of lawyering up on his end; the Hypothesis of Equivalent Exchange really saved him there."
More from Urban Dictionary
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Load more