It's been nearly four years since Cris Cyborg lost to Amanda Nunes ... but she STILL wants her revenge -- telling TMZ Sports she's still gunning for a rematch with The Lioness.
Cyborg initially lost to the UFC legend in December 2018 -- and she's clearly not over it ... explaining to us out at LAX that she'd love to get another crack.
The 36-year-old says she initially wanted to run things back right after the fight 3.5 years ago -- but wasn't able to make it happen.