0_o 

An expression of surprise used on Instant Messaging services.

Person One: I got a sex change!
Person Two: 0_o

0_o by Zak September 6, 2003

0 to 100 real quick 

the tension/etc; escalates quicker than expected.

Male student: DEEZ NUTS!
Teacher: You know, (insert name here), I was a lot like you when i was your age.
Male student: Wow, really?
Teacher: Yeah but the difference is i actually got pussy
Male student 2: Wow, 0 to 100 real quick...

0 to 100 real quick by queenvelocity445 November 21, 2015

0-16 

The 2017 record of the Cleveland Browns, joining the 2008 Detroit Lions as only the second team to go 0-16 in NFL history.

Person 1: Dude, the Cleveland Browns went 0-16 this season!
Person 2: Welcome to the club.

0-16 by StarWarsfan28 January 10, 2018

0.5 inch 

A micro-penis but still bigger than most womens

Man:"i have a 0.5 inch penis and i feel anxious" therapist:"well, it seems like you have a micro-penis, but hey its bigger than womens... For now there is a definition on UD if you need to know the same thing i said".

0.5 inch by Something- May 10, 2021

0 and X 

A phrase used when somebody has died and gotten zero kills throughout the game. This usually applies to online shooting games like Call of Duty or Rainbow Six: Siege. The "X" represents the amount of times the player has died, for example if they died 5 times, it would be 0 and 5. The number replaces the X, while the X acts as a placeholder.

Derek: Bro you're legit garbage at the game.

Jason: Shut the hell up, you're 0 and X shitter. Get a kill before you try to talk shit.

0 and X by Harry Pero Test Ease March 18, 2021

0.1134

If you type this in a caluclator and you flippy it upsidey-down, you get to see some persons thong!!! w0000t! try it!

(Actually, it says h3ll0)

0.1134 by Samus Aran is Awesome May 9, 2005

0 to 100 

Ghetto version of "that escalated quickly"

That went 0 to 100 real quick

0 to 100 by wynnebri November 16, 2014