Justin Blackmon

Former Oklahoma State badass Justin Blackmon insists ... he didn't drive like a drunk lunatic last weekend -- pleading "not guilty" in court yesterday to DUI. According to the arrest report, Justin was pulled over early Sunday morning in Stillwater, OK for driving 60mph in a 35, and swerving into…

12:50 PM PT -- WHOAAAA!!!!! A police spokesperson says Blackmon took a breathalyzer test and blew a whopping .24 -- three times the legal limit. 3:10 PM PT -- Blackmon posted $1,000 bond and was released. He's due in court on Monday. Justin Blackmon has not even played a game in the NFL yet, but…