Top Definition
abbreviation of the phrase "come on son"
Your friend texts you some ignorance and you reply " #cos"

Your friend drops food on you pants and you shout "C.O.S.!"
by ilikegrapes May 28, 2010

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Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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