smoke wagon

noun2

1. •
   (slang, no longer used) A handgun, especially a revolver.

   • Go ahead. Skin it. Skin that smoke wagon and see what happens. […] I'm getting tired of your gas. Jerk that pistol and go to work. — 1993
2. •
   (slang, no longer used) A vehicle that generates smoke; specifically, an automobile or a train.

   • If you gwine afoot, it'll take you about a day; if you gwine in de stage or de homneybuss, you make it in half a day; but if you get in one ob dese smoke-waggons, you be almost dar now! — 1852