A general exclamation denoting surprise, arousal, discontent, or boredom. It's a
buffer word. Earliest film reference is
Deliverance, starring uber-fit
Burt Reynolds.
Damn, you can play that solo.
Shitfire!
That guy just
cut me off!
SHITFIRE!
Shitfire, I'm bored.
Shitfire, you're sexy.