To roll up is to gather or fold something, such as fabric or paper, into a compact and cylindrical shape. This action is often done by rolling one end over the other, creating a tight and secure bundle. It can also refer to the act of winding up or closing something, such as a window or a car window. Additionally, the phrase “roll up” can be used informally to describe someone arriving or showing up, often in a grand or dramatic manner. For example, “He rolled up to the party in a flashy sports car.” Overall, the term ‘roll up’ implies a sense of organization, efficiency, and style.