Slip or slide is a term used to describe two different types of movement. A slip is a sudden, uncontrolled sliding motion, usually caused by a loss of traction. A slide is a controlled, intentional movement, often used in sports such as skiing and snowboarding. The crossword solution for the term slip or slide is 'KNOT', which refers to the knots that are used to secure a person's feet to their skis or snowboard.