SCHLUMP Meaning of SCHLUMP in English [ ʃlʊmp ]■ noun N. Amer. informal a slow, slovenly, or inept person.Origin1940s: appar. related to Yiddish shlumperdik 'dowdy' and Ger. Schlumpe 'slattern'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004