noun /ˈɑːɡəʊ,ˈɑːrɡoʊ,ˈɑːrɡət/
a) A secret language or conventional slang peculiar to thieves, tramps, and vagabonds.
The conversation was in the argot of the trade, full of acronyms and abbreviations that made no sense to the uninitiate.
b) The specialized informal vocabulary and terminology used between people with special skill in a field, such as between doctors, mathematicians or hackers; a jargon.
Wikipedia foundation.