midnight feast

"midnight feast" means an informal meal of various snack foods, eaten at or around midnight, typically arranged and held in secret by children. It is one of many casual words teens pick up from friends, social media, music or sport, and on its own it carries no particular warning. If you hear your teen use it, it is fair to ask what they mean by it in their friend group, since meanings drift quickly. Asking out of curiosity rather than alarm tends to keep the conversation open and useful.

"midnight feast" is informal English meaning an informal meal of various snack foods, eaten at or around midnight, typically arranged and held in secret by children. It is mainly heard in British English (and Irish English). A more formal or neutral equivalent would be something like "an informal meal of various snack foods" expressed in standard vocabulary. A common mistake is to assume "midnight feast" can replace its standard equivalent in every register; keep it for spoken or casual situations and use the formal form in writing.