n. a stealth bogey that can appear on the top lip of an unwitting person, often leading to embarrassing situations

also

v. to be o'neilled, the act of having an o'neill (see above) on one's top lip

.
*girl offers guy a tissue*

guy: "wtf was that about?"

guy's mates: "you've been o'neilled."
by bentley92 January 11, 2010
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
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 09, 2003
Bus Ride home
A drunk Irishman
Zach, stop being an O'neill
by colinr November 29, 2004
To do none of the work, but take all the credit.
Did you see Tom as the Board of Directors meeting? He completely pulled an O'Neill on his staff!
by Truthful Observer2 December 10, 2012
1. the biggest whiney bitch in the history of major league baseball.
2. the right fielder for the yankees in the late 1990s
by donk July 17, 2003

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