- 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.