Английский словарь американских идиом - trick of the trade

{n. phr.}, {usually in plural}, {informal} 1. A piece of expert knowledge; a smart, quick, or skillful way of working at a trade or job. * /Mr. Olson spent years learning the tricks of the trade as a carpenter./ * /Any one can learn how to hang wallpaper, but only an expert can show you the tricks of the trade./ 2. A smart and sometimes tricky or dishonest way of doing something in order to succeed or win. * /The champion knows all the tricks of the boxing trade; he knows many ways to hurt his opponent and to get him mixed up./