COS

abbrev. for Chill Out Slut; used when firing out the word "slut" is inappropriate, i.e. in a grocery store, courthouse, workplace, in front of children, etc. Encouragement for someone to relax, settle down, get out of your way, shut the hell up, etc.

Crazy bitch: "Did you hear about this and that and the other thing and this other thing and that person and what she did and he said and about what color underwear I'm wearing and what kind of weave do you have and where did you get that purse and did I tell you...."

Me: "OMG! COS! Seriously!

by COSsayer April 16, 2011

COS

Comfort Over Swag- Usually given to the guy who'd rather wear sweatpants than jeans out.

"John really believes in COS, dude."
"Yeah he was wearing sweatpants and a sweatshirt to the club last night."

by COS pro June 7, 2013

COS

Abbreviation for "Chamber of Secrets", the second book on J.K. Rowling's Harry Potter.

"cos is my fav book"

by Raqueli88 September 5, 2006

COS

An abbreviation for Chief of Staff, the best drinker in a group of political workers.

John: Eric was really hammered last night after the fundraiser. He must have had 20 beers.

Jason: Yeah, he’s the COS.

by Bamalama Johnson April 7, 2008

COS

abbreviation: Crock of SHIT

Most politicians are just a COS

by splashguard August 5, 2014

COS

It’s an acronym for “Chip of Shit” aka Shit Chip

When I got closer I realized he was playing with a COS..

by Cake.Slaughter November 14, 2022

Co Co

A nick name for Conan O'Brien, given to him by Tom Hanks on the Tonight Show.

Conan hates being called Co Co

by Frank Rider August 23, 2009