What is a Chicago overcoat slang for? July 15, 2020 by Pamela Landy A Chicago overcoat is a 1920s underworld term for a coffin. Related Answers What was a summoner or A canon’s yeoman or A franklin or A manciple or a reeve? Was it the “Chicago Seven” or the “Chicago Eight” who were tried for inciting a riot at the 1968 Democratic National Convention? What is a black act slang for? What is a meat-eater slang for? What do the following slang terms mean to spies? Who founded the city of Chicago?