John O 

The gorgeous frontman of The Maine, a band from Arizona. His birth name is John O'Callaghan, but he is often refered to as simply John O.

Girl 1: Hey that guy is HOT! What's his name?
Girl 2: JOHN O, duh.

John O by xtina101 October 9, 2008

John O 

An autistic little fuck who thinks he's the shit but really is a little pussy who plays hula-hoop golf on his free time. John won the BE Award in elementary school (a reward given to absolute fucking retards). His sister is honestly the hottest fucking girl on the planet and I would fuck her brains out every single day of the week

What's the matter with that kid over there, and who's the hot girl next to him?
Him? Oh, that's John O, and that's his banging sister next to him.

John O by dude748399294756 August 13, 2017

John O'Clock 

A term used when WWE commentator John Bradshaw Layfield makes a mistake on air and people call him out for it. The term originated from Whatculture WWE's King Ross.

IT'S JOHN O'CLOCK MOTHER FUCKERS GET IN THERE.

John O'Clock by XMC7991 August 26, 2016

john o'callaghan 

(the sex god of all sex gods), John O'Callaghan is an Arizona native and is the lead singer of indie-rock band, The Maine.
A.K.A John Ohhh

Laura: I saw The Maine last night and they were amazing.

Grace: Wait did you see John O'Callaghan?

Laura: Yeah I got a picture too

*Laura pulls out phone and shows picture*

*Both girls fall over*

john o'callaghan by lookingformisery February 12, 2014

John O’Neill 

A worthless waste of oxygen who wastes everyone’s time and energy. He is nothing but a burden to everyone around him. He contaminants the dirt he walks on. The true definition of human filth.

“John O’Neill is a worthless pile of shit.”

John O’Neill by Fucking embarrassment January 29, 2020

John O Connor 

A sexy, hunky beast of a man. A truly gorgeous sight. So hot he’ll make you sweat at the thought of his gargantuan biceps.

Emily: Did you see John O Connor?
Eric: OMG Yasss he was so hot!!!

John O Connor by Ilikemennoidont January 3, 2022

John O'niell 

A Fagot from Arizona who lies about having sex multiple times a day
this person is ugly and has no friends he commonly ejaculates to his dads tiny dick when watching a black guy fuck his mom

Stop being a John O'niell Don't lie about sex.
a fagot who needs to go kill there self

John O'niell by BullyDestroyer January 20, 2017