Hue Jackson was so furious after getting the axe from Cleveland Browns owner Jimmy Haslam after a Week 8 loss to the Steelers, he cussed at his boss and threw him out of his office.
This is all according to an explosive new ESPN report which says ... if you couldn't tell ... things were a MESS behind the scenes in Cleveland this year.
Haslam reportedly went to Jackson's office to deliver the news after the team had chalked up another loss -- sending their record to 2-5-1 on the season.
When Haslam told Jackson that the team had "quit" on him and the Browns were firing the head coach, Jackson reportedly said, "Get the f*ck out of my office."
So, why such anger in a moment EVERYONE saw coming?
According to the report, Jackson's position is that Haslam had given him a vote of confidence behind the scenes -- telling him the team would be firing offensive coordinator Todd Haley, not Jackson.
When Haslam decided to move on from Hue on October 29 ... Jackson didn't see it coming (despite an overall 3-36-1 record with the organization) and lost his cool.
The article also paints Haslam as a guy who's in over his head -- who was adamant on selecting Johnny Manziel in the 2014 NFL Draft over Teddy Bridgewater because "something about Bridgewater's handshake rubbed Haslam the wrong way."
Of course, Manziel flamed out of the league while Bridgewater ended up being a pretty solid QB (despite injuries).
Haslam also reportedly nicknamed ex-VP of football operations Sashi Brown, who is black, "Obama" because of his Harvard degree ... which made people in the Browns organization uncomfortable and came off as racial stereotyping.
Brown, however, did not find the nickname disrespectful.
Jackson has yet to comment on the story -- but we're guessing that's just a matter of time at this point.