bag lunch

n. a cold lunch prepared at home and carried in a bag to work, to school, or on an excursion

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noun, pl ⋯ lunches [count]

US : a lunch that is made at home, packed inside a bag or box, and eaten at a job, at school, etc.

Remember to bring a bag lunch to school tomorrow.

— called also box lunch

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ˈbag lunch [bag lunch] noun (NAmE)

a meal of sandwiches, fruit, etc. that you take to school, work, etc. in a bag

compare ↑box lunch, ↑packed lunch