The act of causing trouble or mischief. The term is Gaelic.
Timmy, if you don't quit all that blighyarding, I'm gonna slap the tast right outta your mouth.
by BostonMick March 2, 2009
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Irish term for bullshitting, talking nonsense, acting foolishly or being an asshole.
Denis' ma told him to stop with all the blighyarding or he'd get 5 across the eyes.
by Joluss Gren April 30, 2010
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