C.O 

Correctional Officer. A Prison Guard. Earn around $40,000 a year.

Example:What do you call a man who failed his police test and now earns less than a mailman. A C.O

C.O by Prison Break Addict May 18, 2007

C.O 

The process of buyin a Carry Out from an off licence/ liqour store and then drinking it either on the street or in a house with no parents. A c.o is a much cheaper way of gettin drunk that buyin more expensive drinks inside the clubs or bars

Hey man whats the plan for tonite?
We'r gonna go get a c.o and drink it in the park before hitten the clubs

C.O by Micky Wo December 5, 2009

c.o. 

Correctional officer.

Used by inmates, and C.O.'s alike.

Aye, C.O.! Can't a mutha fucka get some mo' toilet paper?

c.o. by Alex Cuellar April 3, 2008

c/o 

c/o stands for current offer like you offer this much money for something basically like a bid.

Buyer: I wanna buy this insta @

Seller: The c/o is $200

c/o by ‍ raidzi April 5, 2021

c/o 

C/O stands for class of. Like the graduating class.

We are the c/o of 2029!WOOHOOOOO!

c/o by Kapuschi June 3, 2008

c/o 

Current offer,Mostly used In Games where you try to make people offer higher and higher on a item your trying to sell

C/o 500k on my huge dragon kanzar in my pants

c/o by MrNagson June 3, 2008

C/O 

Columbus, Ohio

I'm from C/O.

C/O by Chief Nugs March 11, 2009