jailbait

"jailbait" is sexual slang. In short, it refers to a sexually mature person below, or appearing to be below, the legal age of consent, who is regarded, usually by an adult, as being sexually attractive and/or seductive. Among teens it is usually used jokingly, as crude banter, or in TikTok-style algospeak rather than as a serious statement of behaviour. Persistent or aggressive use directed at a specific person, especially online, is the bit worth paying attention to: that can shade into harassment. If you hear it once in a chat with friends, it is probably nothing. Repeated targeted use deserves a conversation about respect.

"jailbait" is informal English meaning a sexually mature person below, or appearing to be below, the legal age of consent, who is regarded, usually by an adult, as being sexually attractive and/or seductive. It is used widely across English varieties. A more formal or neutral equivalent would be something like "a sexually mature person below" expressed in standard vocabulary. A common mistake is to assume "jailbait" can replace its standard equivalent in every register; keep it for spoken or casual situations and use the formal form in writing.