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2.
To cause them to go into a blinding, seething, often-homicidal rage. See also: Infuriate.
Get someone's Irish up: "This mother-fucker is gonna get my Irish up if he doesn't get out of my way!"
by voodooKobra July 07, 2007
 
1.
Being severely pissed off.
Please don't get my Irish up.
by Saints February 23, 2005