Phrase often added by annoying people to the end of a really bad story, mocking their own story's badness by admitting the necessity for something interesting to happen at the end. Or ironic mocking of these people.
Person 1: "So in the end I gave him back his monkey feces and didn't invite him up when he dropped me off. Isn't that amazing?"
Person 2: "..."
Person 1: "and then I found 20 dollars!"