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1. the biggest whiney bitch in the history of major league baseball.
2. the right fielder for the yankees in the late 1990s
o'neill by donk July 17, 2003
Often spits when presenting classs. Always talks about his wifeee making the class think he's a multiplayer.

His wife is found at different work places on the same day.

Loves verbally raping #Timmy by giving him a sexual look
Timmy: Mr.O'neill can i have an extension
O'neill:Only if u let me ass fuck u
O'neill by O'neill at work January 14, 2019
A try hard, someone with all the gear and no idea.

A bald headed man with glasses who has is an interest in aqautics - he wears a full O'neill wetsuit to the beach.

Some may call me an O'neill for trying so hard to write this definition.
"He's such an O'neill"
O'neill by O'neill detective January 9, 2025

Tony O'Neill 

Tony O'Neill is a New York based musician and author of the cult status novel Digging The Vein. A member of the new e-zeitgeist O’Neill is a founding member of the Brutalist movement.
Tony O'Neill by JustinLev February 13, 2009

Officer O'Neill 

Officer O'Neill is someone who pretends to be a cop for most of the night in 'The Groove', AKA da'club, answering all sorts of officer questions and at the end of the night tells you he just works at Verizon.
"Girl don't talk to that guy he's totally an Officer O'Neill.
Officer O'Neill by KJOYR April 10, 2015

James I. O'Neill High School 

A high school located in Fort Mongomery, NY. It's a school with army brats, rich kids, and ghetto m'fkas from places from NYC, Newbugh, Spring Valley are mixed in one school. Niggas are no joke here they don't take shit, especially none from those burke faggots.
Student 1: Yo waz skool u go 2?
Student 2 : James I. O'Neill High School BOI!!!!
Student 1: Yo didn't a girl from the soccer team get arrested for fuckin up a girl during a game?
Student 2 : DAAAAAAMMMMMNNNNNN SKKIPPYYY!!!!!!