Dictionary

cathouse en · NOUN

Compound of cat + house.

(US, slang) A brothel.
- Do you know how he spent years watching the droopy chicks in cathouses, listening to his cellmates moaning low behind the bars […]? 1946, Milton “Mezz” Mezzrow, Bernard Wolfe, “Don’t Cry, Ma”, in Really the Blues, New York, N.Y.: Random House, book 1 (1899–1923: A Nothin’ but a Child), page 5:
(literally, rare) Any small house, structure or fold used to house a cat.
- Alot^([sic]) of great work is being done all throughout blog land in terms of raising the money to build a cathouse for homeless kitties here at the daily dose. 2012, Chrystal Parker, Daily Dose of Dogs (Aka Cats with Your Coffee), page 490:

Spelling	Features	Labels	Source
cat house		alternative	lexicographic
cathouses	Number=Plur		lexicographic
cat-house		alternative	lexicographic