Bad 'uns is a slang term used to describe people who are mean, unpleasant, or generally bad-natured. It is often used to refer to people who are bullies or who have a negative attitude. The term can also be used to describe criminals or other people who are considered to be dangerous. MEANIES is another slang term that is used to describe people who are mean or unpleasant. It is often used to refer to people who are bullies or who have a negative attitude.