Wiktionary
hurry-up wagon
n. (context archaic US English) A rapid-response vehicle, possibly a kind of ambulance, or paddy wagon
Usage examples of "hurry-up wagon".
Pounce and Gaskin, you take the hurry-up wagon up to the bridge and turn it over.
Says here that last night the hurry-up wagon had eight passengers,' he said.
You can either handle it, or someone else comes along pretty quick to replace you, on account of you taking a quick trip on the hurry-up wagon.