- (US, slang, now historical) A small brothel operating out of a wagon or similar vehicle, servicing travelling labourers, soldiers etc.
- 1975, Nels Anderson, The American Hobo, page 54:
- “Kid, I like women too, but not that way. You need time to get acquainted, drink a little, talk a little. In the cat wagon you got to get it over with and out in five minutes, no time to button your pants.”
- 2013, Philipp Meyer, The Son, Simon & Schuster 2014, p. 441:
- There was an uproad from the fire-eaters, who imagined they were fighting for human dignity and freedom from the northern elite, but more cat wagons were requisitioned and the complaining stopped.