xkcd's number

An extraordinarily colossal number that is calculated by calling the Ackermann function with Graham's Number as its parameters.

The actual value xkcd's number is unknown as most mathematicians cannot grasp its true form without suffering from PTSD-inducing nightmares.

by Ἀπολλύων September 16, 2016

Alden's Number

This number is the result of an equation done by scientist Voash N. Alden to find the estimated number of pedophiles in a 1.5 kilometer radius.

Using Alden's Equation, I found that Alden's Number is roughly 6.90.

by Senboy123 June 23, 2022

number four year

The first ever Urban Dictionary Word of the Day (December 30, 2004).

Number four years are pretty interesting...You should check them out sometime...

by mehhe meh September 8, 2012

Number two

Kiddie speak for doing a poo, used so as to not to have them swearing and they're too young to use technical words like defecate.

Originates from rhyming slang, similarly number three is used for pee.

Let me know if you want to go to the toilet, you'll get a smack if you do number two in your pants.

by Jazpur September 10, 2011

Number Station

Stations left over from the cold war that broadcast numbers. To transelate these numbers, you would need a one-time translator issued by the station's goverment directly to their agents. After being used once the code for the station is changed, -as suggested by the name-, and they are burned. Number stations are not avaible to the public, but everyone somehow manages to record it and upload it to youtube or something.

So, am I the only one who thinks Mason listened to a LITTLE too many number stations? Just maybe, a LITTLE?

by TheDailyFail December 29, 2010

Number 9

This is a meal that Big Smoke ordered in Grand Theft Auto: San Andreas. It is a fillet burger served in Cluckin' Bell restaurant.

Big Smoke: "I'll have 2 number 9s, anumber 9 large, number 6 with extra dip, anumber 7, 2 number 45s, one with cheese, and a large soda."

by GazzeteBoke June 5, 2019

numberwhore

A person with an uncanny but mostly useless ability to remember long strings of account numbers, phone numbers of elementary schoolmates, and/or the SSNs of siblings or exes

Jennifer: Hey, you remember that guy we met 9 years ago at the beach? I wish I could remember his number. He was cute.
Lisa: It's 555-867-5309. You're so lucky I'm a numberwhore.

by jezebel73 October 8, 2009