Dünnpfiff is used online mainly as a German-language gross-out meme sound, with the humor coming from the slang term itself and the uncomfortable audio payoff. It appears in short edits, reposts and joke compilations where creators want a childish, sudden interruption. Rather than carrying a deep backstory, the clip spreads because the word is recognizable to German-speaking audiences and the sound instantly signals toilet humor. Its staying power comes from that fast, lowbrow reaction effect, similar to other exaggerated joke sounds such as fart with reverb.