Cos
Expression of 'cosine' in an actual math problem.
'Cos' is prounounced 'cosine'.
by Diggity Monkeez March 04, 2005

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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 07, 2013

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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 07, 2008

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Cos
abbreviation for "change of subject"
aim conversaton:
Jimz3213: yeah. i totally banged her sister last night.
Susiexxoox4: yeah well. cos...

how is your moms rehab going?
by SUSIEEEEEEEEE October 24, 2007

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COS
Abbreviation for "Chamber of Secrets", the second book on J.K. Rowling's Harry Potter.
"cos is my fav book"
by Raqueli88 September 04, 2006

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Because
FB? I’m voting/voted 4 my FB frs, 'cos they can COPE with ANCilliated DP etc. With play on political names –yes, I know the election is gone, but since home affairs opened for issueing of ID books after voter registration was closed I can’t foresee this being a problem to prepare early for the next elections.
by Hercolena Oliver June 27, 2010

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cos
church of satan.
by ... July 01, 2003

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