caboose

noun

1. a car on a freight train, used chiefly as the crew’s quarters and usually attached to the rear of the train.
2. British. a kitchen on the deck of a ship; galley.
3. Slang. the buttocks.

noun

1. US informal short for calaboose
2. railways, US and Canadian a guard’s van, esp one with sleeping and eating facilities for the train crew
3. nautical
   1. a deckhouse for a galley aboard ship or formerly in Canada, on a lumber raft
   2. mainly Britishthe galley itself
4. Canadian
   1. a mobile bunkhouse used by lumbermen, etc
   2. an insulated cabin on runners, equipped with a stove

n.

1747, “ship’s cookhouse,” from Middle Dutch kambuis “ship’s galley,” from Low German kabhuse “wooden cabin on ship’s deck;” probably a compound whose elements correspond to English cabin and house (n.). Railroading sense is by 1859.