mind your own business

Mind your own business is another way of saying to stay out of other peoples private business and out of their lives and only stick to what affects you personally. This is often said in response to someone who seems to be acting nosy towards others and wanting to know everything they are doing even though it doesnt involve them, such as a neighbor or co-worker. This person is told to mind their own business as a way to tell them to keep to their own life.