The Lakers superstar described exactly how he was feeling after losing to the Dallas Mavericks at home on Tuesday ... saying bluntly, "I feel like poop right now."

The Lakers suffered a 109-104 loss at Crypto.com Arena ... their 7th L in 10 games.

After the disappointing outing, LeBron was asked about his confidence level as L.A. plummets to the bottom of the Western Conference ... and despite the lack of success and a clear feeling of sadness, he's still holding out hope for a turnaround.

"Until you stomp me out, cut my head off, bury me 12 feet under, then I got a chance," James said. "So, that's my confidence."

"At the end of the day, we gotta come in and win ball games and play better."

James then detailed how he's feeling during the slump ... saying, "I hate losing. I feel like poop right now, but tomorrow's a new day and I'mma be prepared and ready for the Clippers on Thursday."

James and Co. found themselves down big early against Luka Doncic and the Mavs ... a theme that's become all too familiar to Lakers fans this season.

The Lakers have been so awful this year -- their own fans booed them off the court on Sunday during an embarrassing loss to the Pelicans.

Tensions got so high during that game, James clapped back at a fan ... which he also addressed after Tuesday's game.

"If you follow my career, I will get into it with a fan. So, that wasn't nothing out of the ordinary for me," James said.

The 37-year-old said he doesn't mind fans booing or cheering him ... but he won't tolerate someone trying to tell him how to do his craft.

"Can't tell me how to play basketball. Not him. Not that guy."