French, German, Russian or whatever curse;
The point is 'running out', not 'ran out' nor 'have run out', so it means 'I'm going to run out', not exactly 'I'm going to use', 'I'm getting outta the house' means you have not gotten out yet.
I know what you mean, you mean the man who said this actually hadn't sworn yet at the moment, so it's like a threat, like 'another' kind of curse, western humor.