It's been three weeks since Antonio Brown's breakup with the Bucs, but he's still clearly not over it -- 'cause he trolled the hell out of his old team after its playoff loss Sunday.
Just minutes after the Rams took down Tom Brady with a last-second field goal at Raymond James Stadium ... AB took to Twitter to rub salt in the wound.
Brown posted an edited picture from his shirtless temper tantrum at MetLife Stadium earlier this month ... showing him holding a sign that said "Bucs eliminated.