noun
department store basement food hall
Colloquial abbreviation of デパートの地下, referring to the food section typically located in the basement of a department store.
デパ地下でお惣菜を買って帰ろう。
Let's buy some prepared dishes at the department store basement food hall and go home.
あのデパ地下はスイーツが充実している。
That department store's basement food hall has a great selection of sweets.
Abbreviation of デパート (department store) + 地下 (basement). The term became common as department stores began concentrating food sales in their basement floors.