CO: 

Class of (graduation)

CO:2021 (class of 2021)

CO: by LETC January 24, 2018

Co 

It’s means you or a short for the word cool

Harry:Your ugly

You:I’m mad at co
Harry:Why are you mad at me

Co by lilsimpyforcedric December 29, 2020

&co. 

Litterally, ‘ and company’. A lot of times used after the main character of a video-game to denote his\her sidekicks.

Can’t wait to see Sora&co. in *Kingdom Hearts II*!!

&co. by Victor Van Styn August 26, 2005

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"

co by d c a January 28, 2008

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.

CO by Andrew January 21, 2006

Co 

Wow, or cool.
Sounds like 'Koe'
'oh!' with a 'k' in front

"Dude that chick just fell!"

"Co!"

Co by luvbo April 4, 2008

CO 

Chihuahua Owner. Created because people tended to rage and break their keyboards when forced to type "chihuahua" more than once a day. Chihuahua owners tend to have a nice laugh and lots of younger siblings.

Look its CO, her dog is so cute ♥

CO by vibrava November 2, 2011