sharp practice

Noun

1. Commercial activity that is possibly dishonest while not actually being illegal.
   • The typical political sharp practice of manipulating history to suit the current agenda.
   • This action was later regarded by some as a piece of rather sharp practice, but Bidder claimed that the landowners concerned […] refused to sell the ground for the railway unless the whole of their property was...
   • 2007 August 29, letters to the editor, “More reports from the check-in desk”, in The Guardian, If this is not actually illegal, it certainly appears to be a sharp practice.
2. A lawyer's unfairly taking advantage of an opposing party's missteps or inexperience to gain an advantage.