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morally degraded; "a seedy district"; "the seamy side of life"; "sleazy characters hanging around casinos"; "sleazy storefronts with...dirt on the walls"- Seattle Weekly; "the sordid details of his orgies stank under his very nostrils"- James Joyce; "the squalid atmosphere of intrigue and betrayal"
open to doubt or suspicion; "the candidate's doubtful past"; "he has a dubious record indeed"; "what one found uncertain the other found dubious or downright false"; "it was more than dubitable whether the friend was as influential as she thought"- Karen Horney