Pistons fans brutally troll Jalen Brunson with ‘flopper’ billboard — but Knicks star gets last laugh

Pistons fans had a message for Jalen Brunson ahead of Game 6 on Thursday night. But he sent them an even bigger one. The Detroit News posted a pair of images on social media of a billboard in metro Detroit calling Brunson a “mother flopper” before the Knicks star hit the series-winning dagger late in…