Cris Cyborg says there ain't a chance Ronda Rousey would come back to fight her in the UFC ... so, she's lettin' Ronda know she's 100% down to rumble in her new home -- WWE!!
We spoke to Cyborg before her upcoming fight with Yana Kunitskaya at UFC 222 ... and had to get her thoughts on Rousey -- Cris' ex-UFC rival who she literally wanted to "kill" back in the day.
Cyborg told TMZ Sports she's over the beef .