1.An irish kid who likes to jump out windows and a proud bearer of an irish name.
2.someone gifted in a hobby such as guitar,and video games.
3.someone who could beat the fuck out of his own kind such as a mckinney or a finney.though a cunningham could kick his ass.
1."did you see that o'day jump out that window?holy shit i did!!"
2."that o'day kicked my ass in halo while playing an awesome solo."
3."mckinney and finney tried acting all tough but o'day kicked there asses and then cunningham came out of nowhere and kicked o'day's ass over a pawffle."