poop-butt
n.— «He could not see the man’s eyes behind the dark shades. But had seen the lean, cruel face before. A face like the faces of other toughs Willie had come up against in the streets. He had grown up with them. He had been one of them, once, a long time ago when he didn’t know any better. But Ice had pulled him out of that bag. Pulled his coat to the poop-butt action.» —by Joseph Nazel The Shakedown , 1975. (source: Double-Tongued Dictionary)