Betty White -- Crashes 'Monday Night Raw' ... 'I'm Gonna Kick Some Ass'

Can you SMEEEEELLLLLLLLLLL what Betty White is cookin?!??!

WWE got straight up "Golden" on "Monday Night Raw" last night ... when the 92-year-old appeared with Big Show and declared, "I'M GONNA KICK SOME ASS!!!"

The crowd went INSANE ... chanting, "BETTY! BETTY! BETTY!"

Unfortunately, Betty didn't actually wrestle ... but it's too bad this whole thing didn't happen 20 years earlier -- she could've settled the infamous beef with Bea Arthur IN THE RING!!

Fun Fact: Bea HATED Betty ... though Betty says she doesn't know why Arthur harbored the grudge.