*out of gas
1. Lit. without gasoline (in a car, truck, etc.). (*Typically: be ~; run ~.) We can't go any farther. We're out of gas. This car will be completely out of gas in a few more miles.
2. Fig. tired; exhausted; worn out. (*Typically: be ~; fun ~.) What a day! I've been working since morning, and I'm really out of gas. I think the old washing machine has finally run out of gas. I'll have to get a new one.