The adjective "shabby" is derogatory and refers to the everyday, pretty shabby clothes. For example, a shabby coat, shabby appearance.
Originally, the word meant a thing, made of zatrapezy - cheap pestryadinnoy tissue, which was distributed in the old days. It is named by the name of merchants shabby under Peter I in 1720, based in Yaroslavl linen factory - one of the largest at the time. Simple pestryadina from which sewed house dress, was the most marketable commodity in manufakturschikov.