porterhouse noun2 •(US, Canada) A cut of beef taken from the thick end of the short loin; it has a T-shaped bone and a large piece of tenderloin; a porterhouse steak. •(US, Canada) A public house where porter was sold; often also served steaks, chops etc.He contrived the same afternoon to introduce himself to one of the footmen of Lady Horatia at the porter house he frequented […]. — 1791 formsporterhouses
