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1. fighting irish
To double fist a girl. First in the vagina and the other in the ass so that it looks like the fighting irish mascot.
Nilano: Yo dude have you ever fighting irished ur girl???

Black man: Yeah i do it all the time she loves it!!!
2. Fighting Irish
Mascot of a northern Indiana team (south bend) Notre Dame and what all of the irish enjoy doing. And often a tattoo on many irish gangsters.
The fighting irish are still not part of any organized league.
3. Fighting Irish
A legendary player in the game Regnum-Online, both for his skill and the fact that no matter what is asked his standard answer is "I can't be arsed"
In a sense Fighting Irish is both used as a derogatory name AND as a positive label of empowerment.
Hey dude, can you help me?
- I can't be arsed
Quit being Fighting Irish.

Wow, did you see that guy kill 5 players in a row?
- Yeah, that's Fighting Irish
4. Fighting Irish
fighting midgets from Ireland
Look at those two fighting irish pussys
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