noun
dilettantish business; amateurish business
A business run in a high-handed, condescending manner as if the proprietor were a feudal lord, lacking customer-oriented service. Often used critically.
あの店は殿様商売で、客のことを考えていない。
That shop runs a dilettantish business and doesn't think about its customers.
殿様商売で
You can't survive these days with an amateurish, high-handed business approach.