J.R. Smith Flips Off Trump Supporters While Blasting 'F*** Donald Trump' Song

How'd J.R. Smith celebrate Joe Biden's victory?

He drove around bumping "F*** Donald Trump" and flipping off MAGA supporters.

So yeah, just as you'd expect ...

The L.A. Lakers star hit the streets (of what appear to be Beverly Hills) on Sunday -- where he blasted the YG song from his BMW, while leaning out of his window and shooting the bird at all of the pro-Trump protesters he saw.

Smith loved every second of it -- and was smiling and laughing while trolling Team MAGA.

Of course, Smith is the latest in a long line of NBA players relishing Biden's victory ... his teammate, LeBron James, has been rejoicing on social media for days -- even waving goodbye to Trump in one tweet.

Trump and the NBA haven't seen eye-to-eye in a long time ... coaches such as Steve Kerr and Gregg Popovich have RIPPED him consistently over the past 4 years.

The president, meanwhile, has been critical of players for kneeling during the anthem in the Orlando bubble this summer ... and he's consistently talked about the league's reportedly low TV ratings.

In fact, at a rally just a few days before his election loss ... Trump got a crowd to chant "LeBron James sucks" after he voiced his displeasure with the Lakers star and the NBA.