#1 shady s. [fly-by-night] (of businesses and businessmen) unscrupulous; "a shady operation". wn
#2 shady s. [louche] of questionable taste or morality; "a louche nightclub"; "a louche painting". wn
#3 shady s. [shadowed, shadowy, umbrageous] filled with shade; "the shady side of the street"; "the surface of the pond is dark and shadowed"; "we sat on rocks in a shadowy cove"; "cool umbrageous woodlands". wn
vizzz