The term SLALOM RUN can be broken down into three parts: the acronym ESS (3 letters), the word 'SLALOM, ' and the word 'RUN.' ESS stands for 'Expert Ski SLALOM, ' a type of skiing competition in which skiers must navigate a course of gates, or flags, while skiing downhill. The SLALOM RUN is a timed event in which skiers must complete the course as quickly as possible while avoiding the gates. The SLALOM RUN is one of the most popular events in skiing competitions, and is often used to determine the overall winner of a ski race.