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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!
O'Mahony by kvcelovesohmyhoney April 30, 2009
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luisa o'mahony 

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.
luisa o'mahony by MrBlob69 June 7, 2016

Eoin O’Mahony

Eoin: The kid that many call Faggy
Example: Have you heard of Eoin O’Mahony? That kids a faggy.

steve o mahony

Someone who can't handle his drink
Jeez, you're some Steve O Mahony
steve o mahony by OldBuddyOldPal October 2, 2014

Dirty O'Mahony 

YOUR COOOOOOL HOT AND SEXY OOOOHHH YEEEAHHHH. YOU ALREADY KNOW YOUR COOL
Dirty O'Mahony by GA0522 May 19, 2021

Cian o mahony 

Irish Tiktoker who asks people in public random questions about every day life?

Cian because known off a video that went viral which he asked what do you look for in a girl?
The guy said “all about the Bunda”
Cian O Mahony is a legend of a man
And that’s facts 💯🔥
Cian o mahony by Unknown User ;) December 15, 2021

Jack O'Mahony 

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.
Jack O'Mahony by BrownieKing November 30, 2022