You can use sharp practice to refer to an action or a way of behaving, especially in business or professional matters, that you think is clever but dishonest.
[disapproval]
He accused some solicitors of sharp practice.
sharp practice in British English
(ʃɑːp ˈpræktɪs)
noun
business old-fashioned
dishonest or unscrupulous behaviour in business
The report seems to be saying that certain sharp practices are very common in business.
He accused some solicitors of sharp practice.
Examples of 'sharp practice' in a sentence
sharp practice
Generally speaking, the motor trade is known to offer opportunities for sharp practice.