The phrase itself is everyday Latin American Spanish slang, with papi used affectionately and que rico meaning how delicious or how good, which is why it doubles as both a food reaction and a flirtatious compliment. Online it spread mainly through short-form video, where creators reuse the same brief voice clip over thirst traps, food reveals, outfit checks and celebrity edits rather than recording their own version. That reuse keeps it instantly recognisable, and its short length makes it easy to drop into memes, reaction videos and chat replies without interrupting the main clip.