A somewhat of a dead meme in Japan that you might hear a Japanese native say. It is often used when someone uses some fancy/obscure English or Japanese word that the listener doesn't know. Literally
translated, it means "
What is that? Is it delicious?". It has
nothing to do with food though. 「Written in Japanese (with 漢字) -> 何それ?美味しいの?」
PS: Thank you Japanese Ammo with Misa