sketchy

adjective, sketch·i·er, sketch·i·est.

1. like a sketch; giving only outlines or essentials.
2. imperfect, incomplete, slight, or superficial: a sketchy meal.
3. Informal.
   1. unreliable or unsafe: That street looks pretty sketchy.
   2. disreputable or shady: I’d stay away from him; he’s got a sketchy past.