A surprisingly satisfying term used to describe a reaction to both moments of pure joy/awesomeness or utter chaos. Can be used in present, past or future tense. Best used as a verb but flexible and adaptable to all kinds of usage.
Jo: Phil! Your car is on fire!
Phil: Stop kermitting Jo, it'll be fine.
George: Ahhh this is the best gyro I've ever had; reminds me of back home!
Phil to Jo: Look at George kermitting about that gyro.