You use this phrase when someone repeats a story over and over or if a person is just spouting bull shit. Instead of saying "You're full of it.", you can say (in a sarcastic tone) "Well....stop the world and let me off".

It's also an appropriate response to a big surprise.
"Did you hear the news? Sally is pregnant!"

"After all these years!? Well, stop the world and let me off!"
by Weird Gonzo July 23, 2022
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