RIFF-RAFF Meaning of RIFF-RAFF in English ■ noun disreputable or undesirable people.OriginC15 (as riff and raff ): from OFr. rif et raf 'one and all, every bit', of Gmc origin. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004