nani sore? oishii no?

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