Sideline Number 

An disposable phone number one gives to acquaintances instead of ones actual phone number. Used to protect ones identity, reputation or to deflect unwanted advances at the club.

Popularized by RussDiemon's single, "Sideline Number"

I always give tinder dates my sideline number in case they turn out to be crazy!

Sideline Number by tacoraj March 23, 2017

taking a number 3

A causal way of explaining what you are were doing to your self after being caught masturbating.

Son you just walked in on your old man taking a number 3, it's perfectly natural.

taking a number 3 by Razor_Beak November 6, 2019

Avocado's Number 

6.12x10^32, equivalent to Nikocado Avocado's mass in yottagrams (as of 2022)

Not to be confused with Avogadro's Number

1: have you heard of Avocado's Number?
2: I learnt it in chemistry class

Avocado's Number by MIRAHQIsTheBestMap January 30, 2022

Dirty Number 

A number that indicates how dirty you are.

"A quantitative measurement of one's promiscuity"

The intention being mainly bragging, but also a sex-positive attitude that appreciates sex rather than regarding it something bad - for both men and women.

The calculation goes:
Dirty Number = X * (A1+A2)
Where

X is the number of partners you have slept with
A1 is the highest age difference you ever had to a partner younger than you
A2 is the highest age difference you ever had to a partner older than you

Dude, my dirty number increased to 213 last weekend.

I have slept with 18 women, once with a woman 7 years younger than me, once with a woman 5 years older than me. My dirty number is 18 * 12 = 213.

Dirty Number by F64 December 15, 2011

Covid Number 

The maximum number of people that are allowed to be together in public to minimize their risks of being infected with the coronavirus.

In Singapore, the Covid number for social gatherings is presently 5; in Hong Kong, it used to be 4 but has now gone down to 2; and in the US, it is a disturbing 10.

Covid Number by Covido December 12, 2020

spicy number 

A human being wearing an item of clothing that can me cassified as: cute, hot, or any other good term you can tink of.

Omg Alicia that's such a spicy number!

Jenn, where'd you get that spicy number!?

spicy number by SpicyNumbaa September 14, 2007

phone number 

A number in which is called to by a person to reach another person

hey Joe's phone number is [phone] if you need to call him

phone number by FerociousMasturBaiter March 6, 2018