1 definition by Hooper P.
(adj./adv.) The state of drunkenness that makes people say "I didn't think it was possible to get that wasted." Only a veteran drinker can achieve a state of O'leariousity (O'leariousness is also an acceptable noun form.)
On St. Patrick's Day, Chris went to the bars at 9:00am. When he came back to the house for dinner he was O'learious and put his head through the wall when he tried to tackle Brian.
by Hooper P. December 5, 2005