Antonio Brown celebrated the demise of Bruce Arians and the Buccaneers in style on Sunday -- partying hard at a Miami nightclub just hours after his former team was booted from the playoffs. TMZ Sports has learned ... the ex-Bucs wideout watched his old squad lose to the Rams in Tampa -- and then he made his way down to Miami to celebrate. We're told the 33-year-old hit XXIII Club ... and copped around $15,000-worth of bottles while there!! Brown rocked a huge fur coat ... and was the life of the party at the packed venue -- which, at one point, played his new "Pit Not The Palace" song for the crowd. Of course, ... (full story)