Throws Drink In Face Of Sick Driver

NASCAR star Bubba Wallace looked like a jerk Sunday ... dousing a sick driver with a drink and calling him a "bitch" -- and it's all 'cause he thinks the dude intentionally wrecked him.

Here's the deal ... during Sunday's race at Charlotte Motor Speedway Roval, Wallace ran into several issues with fellow driver Alex Bowman.

On Lap 1, Bowman hit Wallace ... and 25-year-old Wallace was so PISSED over the incident -- he allegedly flipped off Bowman for the next few laps of the race.

Then, on Lap 42 ... Bowman hit Wallace AGAIN -- this time spinning him out in a turn and causing his car to crash into a wall.

Wallace was CLEARLY heated over the move ... 'cause after the race, he sought out Bowman --…