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
Being severely pissed off.
Please don't get my Irish up.
by Saints February 23, 2005