食たべ残のこし

noun, noun which may take the genitive case particle 'no'

leftover food; half-eaten food

Refers to food that remains uneaten after a meal, either on a plate or as surplus. Often used in contexts of food waste or saving for later.

• 食たべ残のこしを冷れい蔵ぞう庫こに入いれておいた。