A term referring to being so satisfied and contented, that you think you could die happy right then.
Originates from the story of a cat who was so happy with life, that it jumped on top of the fridge and died in peace.
"Nice work passing you're driving test man, you must be stoked!?"
"Dude I'm so happy I could just jump on the fridge!"
"That was the best sex I've ever had, I could jump on the fridge right now!"