- Americana brothelThe derivation may be from the slang can, the buttocks:The little girls, looking so sweet and demure, knew all the words for canhouses... and seemed ready to illustrate them with anyone. (Longstreet, 1956)The use of can to mean a prostitute may be a back derivation from canhouse, or vice versa.
How not to say what you mean: A dictionary of euphemisms. R. W. Holder. 2014.
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canhouse — noun /ˈkanhaʊs/ A brothel. The Roamer Inn was like a model of all the canhouses I ever saw around Chicago, the granddaddy of them all … Wiktionary