O2 

A kind of PDA mobile phone based on Windows Mobile that often hangs, freezes, or crashes for no reason.

Damn, my O2 crashes again, this is the 3rd time I had to restart it today!

O2 by Chak February 18, 2008

o2 

2nd largest British mobile network. As of 2016 owned by Teléfonica.

O2 was the biggest network until T-mobile and Orange UK merged to form EE, part of BT. O2 responded by launching their Priority service and "Be More Dog" advertising

How have you got full 4G here - who are you on?

O2

o2 by CSD123 October 30, 2016

O2 

A person that is "unique" and is "special", the one and luckly only.

O2 of Lambert C Block, The Lawns, Cottingham, Hull, England

O2 by C Block Mafia September 26, 2005

O2 

A word used to describe a whore, slut, or a flamboyant gay person. The reason being O2 is the makeup of oxygen. And oxygen is everywhere, it gets around. Just like slutty person.

I dont want to go to there, it will be filled with O2's

O2 by stupidyellowbear69 January 17, 2011

O2 

A molecule of oxygen. Made by one atom of oxygen taking 2 electrons from the other atom and vice versa. Fundamental for all life on Earth.

a: What did Ariana Grande mean when she wrote the song "just keep breathing"?
b: Well she meant that you need to breathe O2 to survive.
c: No, dumbass. She meant that you need to keep smelling her perfume.
Ariana: No, get help c and b.

O2 by respectable.person December 23, 2022

O2 

The shit you breathe...

I breathe O2!

O2 by greekmadlad March 31, 2024

O2 

That shit funny AF I need some oxygen!!!

That shit (joke) was O2 affff!!! BOUL HAIR LINE GOT ME O2 af!!!! Need some oxygen cause that shit was funny!

O2 by JNNNNNNNNNN April 3, 2025