Right there's more.
You can say that a crappy deal when buying dope is damn shady, but another use is if somebody is wearing really odd clothes - that person is pretty shady!
The word shade can be used as a verb, e.g. dude lemme shade some tokeage= let me smoke some of your joint. (to toke:D)
Also, one can say "dude lets shade off and go bun" - shade meaning walk off or something.
Greg: "Umm... Right here guys..."
John: "Damn Greg, you are shady as hell"
Josh: "Yo who's that kid eating alone with his hood up?"
Anthony: "thats just jeff, hes always shady."