#MIND_YOUR_OWN_BUSINESS [maɪnd jɔːr əʊn ˈbɪznɪs] - не лезь не в своё дело, не вмешивайся / used to tell someone in a rude way that you don't want them to ask about something private.
'Where have you been?', - 'Mind your own business!'. "Где ты был?", - "Не твоё дело!"
