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1 definition by Caiyan

 
1.
A word to use when you don't know what else to say, or when you are not that interested in the conversation. Sometimes, it can be used when you do not have any knowledge of the subject, yet you want to act as if you know-it-all.
Mary: "I saw a very cute kitten just now!"

Tom:"Cool."
by Caiyan January 30, 2005