generally Irish, normally vein, pale tries to use sunbeds, bumder, great in bed (not all the time - rarely actually), small penis, big feet, generally looks like a lepruchan, huge vagina, loves to do the irish jig, likes to make 'friends', often falls easily in love with girls beggining with K or C
Wow she's got a huge O'Mahony!

Stop being such a hell mary O'Mahony - how embarassing!
by kvcelovesohmyhoney April 30, 2009
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Luisa O'Mahony's are the snazziest of them all. Nothing on this planet can exceed the snazzines of a Luisa. Luisa's are not found very easily, infact there is only a single one on this planet with a snazziness rating over 100%. If one wise one finds this Luisa, they shall never let go or they will be shunned for the rest of their life. Also Luisa's like The Walking Dead and Pizza, so if you don't, GTFO. And don't forget the cheesy crust.
Hey Dude, I met this girl called Luisa O'Mahony, should I give her a call?

Hell yeah dude, just bring pizza and you'll be fine.
by MrBlob69 April 17, 2016
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irish leprechaun who works at KFC with a retard ranga brother
Jack O'Mahony is a sexy Irish leprechaun who touches his ranga brother a lot.
by BrownieKing December 1, 2022
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