cat’s meat n.
1. [early–mid-19C] the human lungs.
2. [mid–late 19C] the vagina.
3. [late 19C+] (mainly juv.) a meat pie.
4. [late 19C+] (N.Z.) in fig. use, a term of dismissal or derogation.
[1960s–80s] a hospital, usu. gynaecological.
SE in slang uses
[late 19C–1900s] a street-seller of cooked horsemeat, presumably as petfood.
[mid-19C] (UK Und.) a restaurant.