by JOhn Bono November 20, 2003

-O-
by L_tazzy August 21, 2023

by iloveuforever;-; November 27, 2020

King-side castling or short castling, a move in chess consisting of moving the king two squares toward the king-side rook on the same rank and then moving said rook to the square the king passed over. The move cannot be performed if the player is in check, or if the king or the rook in question has already moved. King-side castling is notated O-O.
1. e4 e5
2. Nf3 Nf6
3. Bc4 Bc5
4. O-O O-O
2. Nf3 Nf6
3. Bc4 Bc5
4. O-O O-O
by ronnosexual August 12, 2022

by a poompaloompa August 27, 2020

A term coined by Michael Stevens of Vsauce, Boil-o is an invisible, undetectable, unverifiable/unfalsifiable substance that appears whenever things begin to boil. While, yes, the phenomenon of boiling is perfectly explained without Boil-o, Boil-o is still there.
Boil-o is used as an example of redundancy. If a phenomena is perfectly explained without something, why include the something?
Boil-o is used as an example of redundancy. If a phenomena is perfectly explained without something, why include the something?
"Johnny: Yo man, I'm cooking up some pasta, you want some?
Mike: Yeah, sure, just start boiling the water.
Johnny: Don't you mean "apply BOIL-O to the water?"
Mike: For fucks sake, John, I don't want to get into this philosophy shit, it's been a long day, just- just tell me when you're done, alright?
Johnny: Jeez man, fine, I'll tell you when it's done.
Mike: Thank you.
Mike: Yeah, sure, just start boiling the water.
Johnny: Don't you mean "apply BOIL-O to the water?"
Mike: For fucks sake, John, I don't want to get into this philosophy shit, it's been a long day, just- just tell me when you're done, alright?
Johnny: Jeez man, fine, I'll tell you when it's done.
Mike: Thank you.
by Hexiliac June 8, 2022

O. Z. stands for being overzealous, a brain disorder. Those afflicted do not know when to stop - planning a party down to the most minute detail, decorating a room or giving an endless stream of gifts on Christmas when a few would more than suffice. Frequently mis-diagnosed in children as industriousness or generosity, by adulthood it's incurable.
"I'll just tidy up", she said, heading for the kitchen, "a few minutes." Hours later she emerged, having rewashed the clean dishes, glasses and cutlery, scrubbed the floor, wiped, re-wiped and sterilized the counters, thrown out loads of perfectly good food to neaten the fridge and arranged their Urban Dictionary mugs in alphabetical order, her O. Z. out of control.
by Monkey's Dad December 29, 2023
