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Law of Large Numbers 

The rule that confirms that as the number of trials increases, the actual probability approaches the expected probability. If you flip a coin 1000 times, you might get 470 heads. Or 550 -- expected probabilities of .47 and .55, respectively. But, damn it, the limiting value of that probability as the number of flips increases without bound is going to be .5.
Brother, if you continue playing that slot machine, the law of large numbers is going to get your ass.
Law of Large Numbers by Zac October 6, 2003

doin numbers 

Making money, doing profits
invest in our stock and now we doin numbers
doin numbers by Amsmams August 21, 2007

crunch the numbers 

Vigorously computing costs or calculating figures for a purchase or estimate.
You wanna buy this house? Let's crunch the numbers.

Imaginary Numbers 

The concept that exists just to make people in Algebra 2 die of confusion.
"How does this pointless stuff that I'm not even going to use when I'm older even make sense? I just don't see how there can be Imaginary Numbers!"

(dies in class)
Imaginary Numbers by NYC213 October 5, 2015

Numbers mason 

The numbers mason, what do they mean!
Numbers mason by LeafyBoi June 13, 2020

your days are numbered 

Indicates you don't have many days left to live, you will die soon. Often associated with a threat of some kind.
bouncer: beat it loser
loser: your days are numbered mofo