Antonio Brown Trolls Buccaneers After Playoff Loss

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."

He captioned the pic with a crying emoji, and the words, "ICant."

Brown has had big beef with the Bucs ever since the meltdown during the Jets game ... accusing Bruce Arians and the team of trying to force him to play on a badly injured ankle.

Brown's departure got so messy, he actually shaded Brady following the whole ordeal.

But, it seemed Brown had been moving on -- he told TMZ Sports last week he and Brady had hashed out their issues ... and he also admitted to photogs recently that his shirtless rant was not very professional.