"That looks good to me," said Peter, delighted that the argot fell so aptly from his lips.
"It is a kind of argot which belongs only to Americans," I answered in an undertone.
It is only argot anyway, and it doesn't mean sotte, but nave.
This dialect is termed in English slang, in French argot, in Italian gergo.
The which, in Parisian argot, at once means everything and nothing.