parlance

1. N-UNCOUNT You use parlance when indicating that the expression you are using is normally used by a particular group of people. 術(shù)語(yǔ)[正式] [supp N, usu 'in' N]

The phrase is common diplomatic parlance for spying. 這種說(shuō)法是對(duì)間諜行為的常用外交辭令。