Philadelphia Eagles lineman Jason Kelce just gave one of the greatest Super Bowl parade speeches EVER -- blasting the team's haters in an expletive-laden, WWE-style scream-athon.

AND IT WAS AWESOME!!!

Kelce was decked out in his full Mummers costume -- and named names of writers/media members who predicted doom for the Eagles this year.

He cussed. He spat. He yelled a lot. He got the crowd to chant every time he took a breath.

Of course, his teammates and coaches loved it.

Fly, Jason, Fly!!!