Kelly Oubre Jr., Nick Nurse Fined $50k Each For Yelling At Referees After Game

Philadelphia 76ers hooper Kelly Oubre Jr. and his head coach, Nick Nurse, are gonna have to write out a check to the NBA -- the two were just fined $50,000 each for going ballistic on referees after their 108-107 loss to the Clippers on Wednesday.

The matchup ended in quite the controversy -- the Sixers forward drove to the basket to attempt a game-winning bucket ... and despite making contact with Paul George, a foul wasn't called.

Oubre and Nurse were irate over the no-call after the buzzer -- Oubre even flipped the bird at the officials ... and Sixers staffers had to step in to keep the two from going further.

Many believe Oubre also pointed at each official and called them a "bitch."

Tsunami Papi admitted after the game he knew a fine was coming … and he was right -- 'cause the league handed down the punishment for "verbally abusing and directing an obscene gesture" at the officials.

Nurse's fine was for "aggressively pursuing and verbally abusing game officials."

Oubre shared his regret over his actions ... saying, "I want to apologize for just losing my cool … I just ask for forgiveness. It wasn't cool, so I'll take whatever penalties come with that."

While the financial punishment is nothing to scoff at, ex-NBA player Lou Williams predicted KO would actually get a heftier fine … saying, "This is $25,000 per bitch, without a doubt."