\LOOSH\, adjective: Of questionable taste or morality; disreputable or indecent; dubious; shady
A wine troubled by the presence of suspended particles which cause it to be cloudy
If you describe a person or place as louche, you mean that they are unconventional and not respectable, but often in a way that people find rather attractive. that section of London society which somehow managed to be louche and fashionable at the same time. = disreputable
{s} blatant; vulgar, ostentatious; disreputable in a rakish or appealing way; not decent