na-adjective
A direct loanword from English, used in casual or trendy contexts to describe food or drink as very tasty. Often carries a slightly stylish or emphatic feel compared to native words like おいしい.
このケーキ、本当にデリシャスだね。
This cake is really delicious, isn't it?
デリシャスな料理をありがとう。
Thank you for the delicious meal.