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1.
CO
A term used to refer to a corrections officer.
Shithead CO's often turn a blind eye to jailhouse violence.
by Tim April 10, 2005
 
2.
CO
Corrections Officer, ie, Prison Guard.
The CO's put the joint on lockdown...
by Slick Willy March 18, 2005
 
3.
co
Short term in the military for Commanding Officer.
Where can I find a CO?
by Bobby De Niro August 04, 2004
 
4.
Correctional officer.

Used by inmates, and C.O.'s alike.
Aye, C.O.! Can't a mutha fucka get some mo' toilet paper?
by Alex Cuellar April 03, 2008
 
5.
CO
A shortened version of the adverb "coldly" used in hip hop culture which is often used merely as an extra syllable in hip hop lyrics and means "just" or "simply."
I was co shootin' some hoops before I went to co get ill.
by Andrew January 14, 2006
 
6.
co
Short for "coo," which is short for "cool." It is used as a positive acknowledgment or a signal of approval, not as an adjective.
Proper use:
"Hey, we're going to meet up with Jimmy at six."
"co"

Improper use:
"Get the fuck off my sister"
"Yo man, be co"

by d c a January 27, 2008
 
7.
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

by Prison Break Addict May 05, 2007