The phrase is everyday Finnish, with 'krapula' being the normal word for a hangover, so the line needs no setup for Finnish speakers and reads as funny even with subtitles for others. Short foreign-language reaction clips like this spread on soundboards and in short video edits because the meaning is simple, the delivery is deadpan, and the length fits a single cut. It stays in use as a morning-after tag for party recaps, travel vlogs and friend group jokes, where the joke is the obvious diagnosis nobody wanted to hear said out loud.