As a general rule of thumb, never cross an Irish woman.
And if her eyes narrow and start flashing, head for the pub.
"The wealth of another region excites their greed; and if it is weak, their lust for power as well. Nothing from the rising to the setting of the sun is enough for them. Among all others only they are compelled to attack the poor as well as the rich. Plunder, rape, and murder they falsely call empire; and where they make a desert, they call it peace."
Tacitus, Agricola