The story
From Tuscan + porterhouse, from being a beefsteak dish originating from the Tuscan city of Florence in Italy based on the porterhouse cut.
Etymology from Wiktionary, CC BY-SA 4.0.
Tuscan porterhouse
Today it means: The traditional signature steak dish from Florence, Tuscany, Italy, consisting of a large thick-cut porterhouse or T-bone steak grilled to rare and seasoned with lemon. Full definition →