Nervous, apprehensive.

(entertainment, advertising) Creatively challenging; cutting edge; leading edge.

(entertainment, advertising) On the edge between acceptable and offensive; pushing the boundaries of good taste; risqué.

(dated) Irritable.

(art) Having some of the forms, such as drapery or the like, too sharply defined.

Sharp; having prominent edges.

(slang) Cool by virtue of being tough, dark, or badass.

(Internet slang) Exhibiting behavior that is disconcerting or alarming, sometimes in an effort to impress or to troll others.