Royal Standard de Liège, commonly referred to as Standard Liège, is a Belgian football club from the city of Liège. They are one of the most successful clubs in Belgium, having won the Belgian league on ten occasions, most recently in 2007–08 and 2008–09. They have been in the top flight without interruption since 1921, longer than any other Belgian side. They have also won eight Belgian Cups, and in 1981–82 they reached the final of the European Cup Winners’ Cup, which they lost 2–1 against Barcelona.
Standard players are nicknamed the “Rouches” because of their red jerseys. The French word for red, rouge, when pronounced with a Liège accent, sounds like “rouche.” Source: Wikipedia