"nap the regulars" means: Obsolete British criminal slang from the thieves' cant tradition, meaning to divide the stolen loot among the members of a criminal crew. Na.... This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.