Chicago overcoat

noun3

1. •
   (US, slang) A coffin.
2. •
   (figurative) death; being killed or murdered.

   • ‘Go ahead and blast and see what it gets you.’ ‘A Chicago overcoat is what it would get you, little man.’ — 1939
3. •
   (US, slang) Synonym of concrete overcoat or cement shoes.