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a question somebody asks when somebody shows off or slacks off near the end of a sporting play or just in life. When Usain Bolt stopped running at the end of his 100M dash. Similar to saying " are you insane?"
"Hey Thomas, you finshed your final english essay yet?"
"No, I don't really need to, the years practically over"
"Are you Usain?"
by Adam Bellerose September 03, 2008
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