Drizzy got his entourage together and flew his private jumbo jet down to his ex, Rihanna's home turf -- and decided to get in a little outdoor hoops. No small feat on a July day in the tropics!

Champagne Papi slipped on some Nike gear -- sneakers, socks, shorts, jersey, headband -- and showed off his sweet jump shot ... but as the crowd continued growing, Drake paused the game and donned a face mask while snapping pics with locals.

He's easily the biggest draw on Barbados -- far as we know Rihanna's not down there -- and unlike the NBA's restart in its Disney bubble in Florida, Drake put some butts in the seats!!!

Dude's got game too ... looks like Drake's been practicing on his insane home indoor basketball court.

Check ball!!!