A phrase used in response to someone starting a new thread/conversation/tweet/etc... about a topic/website/video/etc... that was discussed ad nauseum by the rest of the civilized world a number of months/years ago.
The phrase is derived from the Back to the Future trilogy of movies which involved a DeLorean that could travel through time. The plot of the first movie in the trilogy revolves around the main character becoming trapped in the past when he can't refuel the DeLorean.
"You cannot say POP and forget the smoke" is a line that POP SMOKE (legend and listen to DIOR if you haven't heard of him) it was said in GOTTI by POP SMOKE and Travis scott.
RIP POP SMOKE, Gone too soon... 20th of Febuary 1999 - 19th of Febuary 2020
They’re pills that create a sort of temporary forgettingness. So if somebody finds out how you do a trick, you just give ’em one of these, and they forget the whole thing. It’s a mainstay of the magician’s toolkit, like how clowns always have a rag soaked in ether.