Top Definition
O'Mahoney is an extemely AWESOME last name only givinto people who are AWESOME!! people with the last name O'Mahoney are all awesome and they are very intelegint. They are so cool and they get really pissed off when you leave out the appostraphy.. god damn it annoying
O'Mahoney's are an unique and they are awesome creatures
by O'Mahoneyrocksyoursocks:) March 08, 2011

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