When you have an expression with many different terms and you want to find the sum at a very large of said terms. If you have a few terms that grows so immensely faster then everything else, you can write off the small ones as irrelevant and only focus on the bigger ones (Created by Wifies on YouTube)

Lets say we're trying to find out about all of the organisms on the planet. Because there's just so many more bacteria than there is anything else, we can use Fies' Law and just not include all of the almost extinct organisms (Since It wouldn't affect the number that much)

Fies' Law by bruhcubed3 April 27, 2021

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Toilet Fiesta

When your fecal matter contains more than 2 colors; Usually caused after consuming large amounts of Hispanic food, corn, or multi-colored popsicles.

Guy 1: Dude....I shouldn't have eaten that many 5 layer burritos..
Guy 2: Yea man, you'll probably be having a toilet fiesta in 15 minutes
Guy 1: -Proceeds to run to the nearest bathroom and destroys the toilet-

Toilet Fiesta by Im Jergen Noff July 20, 2010

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