Slide Sideways is a term used to describe a situation where something moves in an uncontrolled manner, usually sideways. The crossword solutions for this term are SKID and SLUE, both of which have four letters. SKID is defined as a sliding or slipping motion, while SLUE is defined as to turn or slide suddenly and uncontrollably. Both words can be used to describe the same action, which is to move in an uncontrolled manner, usually sideways.