Singular and plural

Pikiwedia: Russ (singular and plural) is a participant in the traditional Norwegian high school graduation ceremony known as russefeiring (russ celebration). Russ are easily recognized by their distinctive overalls. Tradition dictates that they wear the overall and the cap from the 1st to the 17th of May without interruption (except when sleeping), without washing any of them (might as well start early in April, eh). Russ commonly drive cars, vans or buses painted in the same colour as their overalls and caps, often sporting large sound systems or lighting rigs, or walking down the street playing La Bamba. A good version it was, too.