Abbreviation for cash-only. Used to describe establishments that do not accept credit or debit cards as means of payment.
I don't want to hit up The 500 Club tonight, that place is a cash-o dive bar and there's no ATM nearby.
by cpaizis April 19, 2008

You're driving and think that you're going the wrong way so you do a u-turn, as you are doing the u-turn, you realize that you were actually going the correct way in the first place and so you do another u-turn, hence you have done an o-turn.
by bagpussinboots February 13, 2012

by thomas the train engine November 11, 2006

Dude 1: Wow, the internet is full of porn!
Dude 2: O RLY?
Dude 1: have you ever known that there were 999 cases of heart attack in a time of 9999999999 seconds in the North Africa?
Dude 2:O RLY?
Dude 2: O RLY?
Dude 1: have you ever known that there were 999 cases of heart attack in a time of 9999999999 seconds in the North Africa?
Dude 2:O RLY?
by bactac May 22, 2006

G-money-"I just got my issue today mayne"
Killerfred-"how much you got nigga?"
G-money-"just a half-o, lets get crackin"
Killerfred-"how much you got nigga?"
G-money-"just a half-o, lets get crackin"
by Shweetbox August 4, 2005

O-Block, previously known as WIIIC City, officially Parkway Garden Homes, is a low income housing project in northern Greater Grand Crossing. It is dominated by Black Disciple gang set 3Hunna, or 300. It is on MLK Jr. drive. The top of the street intersects 63rd street, who are bitter rivals of O-Block. Many famous figures such as Michelle Obama, Keith "Chief Keef" "Sosa" Farrelle Cozart, Dayvon "King Von" Dayquan Bennett, and many others come from here.
Student 1: Give me your lunch money nerd!
Student 2: I'm from O-Block bro you know we don't mess round there!
Student 1: Oh- I didn't know you was gangsta...
Student 2: I'm from O-Block bro you know we don't mess round there!
Student 1: Oh- I didn't know you was gangsta...
by ソサ// Sosa February 24, 2022
