The Collaborative International Dictionary of English v.0.48:
louche \louche\ adj. of questionable taste, decency, or morality; not reputable; as, a louche nightclub; a louche painting. Syn: shady. [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
louche adj 1: of questionable taste or morality; "a louche nightclub"; "a louche painting" [syn: louche, shady]