Meek Mill Disses 49ers Fans With 'Hit 'Em Up' Freestyle After Eagles Win

Meek Mill celebrated the Eagles' big win with a freestyle rap on Sunday ... taking shots at 49ers fans by dropping bars on one of the most iconic diss tracks of all time.

The Philly rapper posted his video to Instagram right after Philly whooped San Francisco 31-7 in the NFC Championship game ... punching their ticket to Super Bowl LVII.

Meek used the beat from Tupac's "Hit 'Em Up" to send his message to the Niners ... which, of course, was a diss track to Notorious B.I.G. -- and to this day, remains one of the top verbal attacks in the rap game.

"This for all my 49ers fans right here ... First off, f*** ya clique and the team you claim," Meek starts off.

"Northside, Southside this an Eagles game. Y'all claim to keep it playa, but we packed ya bag -- plus the other quarterback, y'all couldn't even pass it back."

Of course, Meek is referring to S.F. rookie quarterback Brock Purdy, who injured his elbow in the first half. To make matters worse, his backup, Josh Johnson, left the game in the 3rd quarter with a concussion.

BTW, Meek was watching the game in the Lincoln Financial Stadium suite with an A-list crowd -- Kevin Hart, Lil Baby, James Harden, Joel Embiid, Michael Rubin, and former Eagles receiver DeSean Jackson.