use 1: Any person of Asian or Micro island heritage, who is, at a given time, up to 'no good' as one would say. One who is participating in some trickery towards his/her own gain.
use 2: Loose gaskets like Kim Jong-il
(In a Minnesotan accent) "Johnathan! Hey, John-John! Check out that spooky gook behind the counter there."
(Again, with accent) I don't want to come here again. I don't trust those spooky gooks making my processed meat squares.