0 words and expressions that are used by small groups of people and that are not easily understood by other people:
thieves' argot
The term was used in gambling argot to refer to a gambler.
Matthews (1887, 94f) writes that, once this trade had been outlawed, traffic was conducted in an argot in which gems were referred to as 'calves'.
Lodge records "an enduring literary convention which made argot an indispensable component in any portrayal not only of the criminal fraternity, but of workingclass males in general" (247).
I will make sure that the services avoid the use of argot.
We are talking about a term which is common argot within the legal trade.
However, it seems to me that that is different from what might be called, in the argot, a "sting" operation because they vary infinitely.
But that argument is the argot of the thieves' kitchen.
Hecht, in particular, was wonderful with slang, and he peppered his films with the argot of the streets.