making off without payment

"making off without payment" means the criminal offence of bilking. 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.

"making off without payment" is formal / specialist English meaning the criminal offence of bilking. It is mainly heard in British English (and Irish English). A more formal or neutral equivalent would be something like "the criminal offence of bilking" expressed in standard vocabulary. A common mistake is to use "making off without payment" in casual speech where a simpler phrase would do; reserve it for formal, technical or written contexts. If you are a B2 or C1 learner, it is useful to recognise this word when you hear or read it, but think carefully about whether the situation really calls for it before using it yourself.