a characteristic language of a particular group (as among thieves); "they don't speak our lingo"
People sometimes refer to a foreign language, especially one that they do not speak or understand, as a lingo. I don't speak the lingo
A lingo is a range of words or a style of language which is used in a particular situation or by a particular group of people. In record-business lingo, that means he wanted to buy the rights to the song and market it. an author who writes in a lurid lingo, freely punctuated with crude expletives