>>67435719"pomf" is basically jap version of "poof" or "fluff", the sound a soft thing makes when the air leaves it. It is a generic sound effect that became popular because of the screen shot of the meme about beds
Then, Nyanners, poaching from another generic ass sound effect (while on her nekopara arc), made a song about the doujin, then turned around and disparaged the fandom she gained over the song, after she got her cashflow established