To have a neck and neck insanely close game of Fifa/Pro evo but wait until the very last min to score the winning goal and win the game.
'Ahhh you fucker! You O'Neilled me!!'

'Shit what an epic game this has been might have to go to pen- fuck off as if you just O'Neilled me out of nowhere!!! Bastard.'

'Don't you dare O'Neill me you prick!!'
by Fifad00d August 15, 2019
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O'Neil is a wonderfully enlightened person. A majority of the people think O'Neil means hero. The direct translation would be Oh Hero! Much of the world looks up to the person with the name "O'Neil". They hope that one day they can be like him. Women are often in awe and have created what we now call the groupie movement. Little is known about the magical aura that surrounds this magnificent person.
When things look bleak one will often hear the chant "O'Neil, O'Neil, O'Neil." Only a good keen listener is able to pick up on this.
by Ryan Sunbelt February 4, 2010
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Air Force Colonel Jack O'Neill. Goes through the Stargate. Shoots lots of stuff and never runs out of sarcastic remarks.
BAAL: "Do you not know the pain you will suffer for this impudence?"
O'NEILL: "I don't know the meaning of the word...Seriously, impudence. What does that mean?"
by yo mama July 20, 2003
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aka "the o'neill"

the asgard's most technologically advanced ship, designed to fight agaisnt replicators
named after colonel jack o'neill
by thor December 9, 2003
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An O'Neiller is when someone is on the down and out in some shape or form, and decides to grow a beard and lets their Appearence Dishevel. It often occurs in men between the ages of 27-40, It is not to be Mistaken with mid life crisis. O'Neillers are bred from hatred and often the lack of Sexual Intercourse.

Folklore tells us that the Famous O'Neill was Roland Turlogh O'Neill, a feared Celtic warrior from Carlow town who was also said to have been a fantastic painter/decorator and a very Agressive Bearded lover.
After Patsy left him, Joe went on a terrible O'Neiller.

"God whatever you do, dont poke fun at seans beard, I hear he is in the middle of a terrible O'Neiller and is liable to do anything!
by SKetchgarda December 17, 2009
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