A phrase used when you really don't believe what your ears just fucking heard.
Cam-Glenns been getting some muscle dude i can see it

Me- Sure Guy
by Cam of Duty March 17, 2010
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When someone tells you something that you don't believe, or is utterly impossible
Matt: "I did it with those two twins at the table over there."

Chase: "Sure guy!"
by BBaller2010 April 6, 2010
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