adj. The act of still having your virginity in college while being surrounded by drunken pussy 24/7. Drinking excessively almost everyday for no apparent reason while also going on explicitly long rants about nothing that have no relevance to the pertaining situation. Not showering for days at a time is also a trait of O'Callaghan. In summary, the act of completely embarrassing the Irish race one drunken night at a time.
by Stone, Keith September 16, 2010
(the sex god of all sex gods), John O'Callaghan is an Arizona native and is the lead singer of indie-rock band, The Maine.
A.K.A John Ohhh
A.K.A John Ohhh
Laura: I saw The Maine last night and they were amazing.
Grace: Wait did you see John O'Callaghan?
Laura: Yeah I got a picture too
*Laura pulls out phone and shows picture*
*Both girls fall over*
Grace: Wait did you see John O'Callaghan?
Laura: Yeah I got a picture too
*Laura pulls out phone and shows picture*
*Both girls fall over*
by lookingformisery February 12, 2014
a really nice person, who has a great personality. Very handsome and charming, can sometimes be misjudged by his lack of knowledge around the complications of thunder and bringing the bins in, but overall if you ever meet a Liam O'Callaghan, you are the luckiest person in the world
Liam O'Callaghan is a handsome young man
by Jim off Friday night dinner September 25, 2020
Fucking over your shift trade by putting him on the medic; putting yourself on the pump when you've got a trade coming in for you.
"I didn't want to be tired for my vacation so I asked my trade to go on the medic for me....had to go Full O'Callaghan"; "Fuckin' guy went full O'Callaghan on me and put me on the medic"
by BigBert69 April 10, 2024
When you fuck over your shift trades by making them go on the medic; Treating your trades like shit; Ensuring you can never find shift trades again by putting yourself first.
"I didn't want to be tired for my vacation so I put made him do my medic night....had to go Full O'Callaghan on him"
"Fuckin' guy went Full O'Callaghan on me and made me ride the medic for him, I'll make sure the boys don't take shifts for him ever again."
"Fuckin' guy went Full O'Callaghan on me and made me ride the medic for him, I'll make sure the boys don't take shifts for him ever again."
by BigBert69 April 10, 2024
Although funny and charming, a person who sometimes shows pretense. Rory O'Callaghan's are often known to show alter-agos in the form of Raymond when faced with group situations. Referable to the term Wasteman.
by Griff96 November 26, 2021