South Florida rap artist Brisco pleaded guilty in federal court in Miami on Friday to charges of selling fake currency and committing identity theft and fraud. Brisco, whose real name is British Mitchell, is likely facing 4 ½ to 5 years in federal prison when he is sentenced in May, his lawyer said. Mitchell, 34, wore khaki jail scrubs and was handcuffed and shackled in court. In a somber voice, he replied “guilty” in response to each of the three charges. He admitted he was trying to sell more than $150,000 worth of counterfeit money, including several thousand dollars he sold to an undercover law enforcement officer. Mitchell came under…