The Oxford Thesaurus An A-Z Dictionary of Synonyms - disreputableadj.

1) low, base, abject, contemptuous, unrespectable, disrespectable, untrustworthy, discreditable, dishonourable, disgraceful, reprehensible, shameful, despicable, ignominious, bad, wicked, heinous, vicious, iniquitous, vile, opprobrious, scandalous, louche, questionable, dubious, Colloq shady: She keeps disreputable company. 2) dishevelled, unkempt, slovenly, untidy, shabby, disordered, messy, dirty, bedraggled, scruffy, seedy, threadbare, tattered, Brit down at heel, raddled, US down at the heel(s) , Colloq sloppy, Slang Brit grotty: That disreputable beggar is your brother?