A Cree exclamation, often used in situations where the individual is shocked either by what they are seeing or by what has happened.
1) It can be used after witnessing a funny incident: "Jishtug! I couldn't stop laughing after Blaine gave himself a bleeding nose when he walked into those glass doors thinking they were open."
2) It can be used in dismay "Jishtug! why did you break my iPod?"
3) It can also be used to indicate pure surprise or shock if someone suddenly pops up from behind you.