Does 'luck of the Irish' mean bad luck?

Not really. Irish wear a lot of green. A lucky clover is green. So,basically it means good luck.

Also you might just be superstitious. love and peace funnygal709 :)

Actually the phrase did indeed refer to Bad Luck. There's also a variation on Murphy's Law: 'If it can go wrong, it will. 'Tis the luck of the Irish."