it means "this never happened", like "this barista had a pride pin and I told him to go f**k himself. and
everyone in the starbucks calpped." it was used in stories like that and now it means that one meme from shreck
ME: *WHISPERS TO MY FRIEND*1; TEACHER: WOULD YOU LIKE TO SAY TO THE CLASS WHAT WERE YOU WHISPERING? ME: NO, THAT'S WHY I WAS WHISPERING! TEACHER: DID YOU JUST ANSWERED ME BACK?! ME: YES, THAT'S HOW A DISCUSSION WORKS; ALSO MY BRAIN: