The phrase "to do over" means to repeat or redo something that has already been done. It can refer to a task, project, event, or situation that needs to be redone because it was not completed correctly or satisfactorily the first time around. The term is often used in the context of home improvement projects, where a repair or renovation may need to be re-done due to errors or dissatisfaction with the results. In other words, "to do over" means to take another chance at something and try again until it is done right.