Ronda Rousey just faced off with Amanda Nunes at the UFC 207 weigh-ins ... and it was INTENSE!
Nunes -- nicknamed "The Lioness" -- showed up in lion mask and looked VERY easy going about the whole fight.
Ronda flashed a smile for a quick second before returning to angry mode.
But the big story was the confrontation between Cody Garbrandt and Dominick Cruz -- when they yelled and pushed at each other during the showdown.
These guys have been going at it for MONTHS ... and now they're just 24 hours away from settling their score.
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