The act of asserting vengeance upon another with a sack of potatoes.
Seamus fucked Sully's girl behind his back, so Sully gave him an Irish beatdown.
by Guitarwolf March 1, 2012
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When you Poop in a sock and hit somebody with it.
Jesse: Holy Shit! What's all over you face???!!!!

Adam: It's Shit!! Matt Gave me a Good ol' Irish Beatdown
by The Italian Stallion 1972 July 17, 2011
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