slanguage noun a slang vocabulary US,1879 A jargon-like attempt to dignify slang as a language.
— Brigid McConville and John Shearlaw, TheSlanguageofSex, 1984
Edgar Wallace, Peter Cheyney and James Hadley Chase followed the American slanguage into the Hard-Boiled school [of fiction.] — Paul Duncan, NoirFiction, p. 25, 2000