doup

The bottom end of something; the human buttocks.

on the eve of Ellison's wedding they took him as he was going into his house and took off his breeks and tarred his dowp and the soles of his feet and stuck feathers on them and then they threw him into the water-trough, as was the custom.

A cigarette butt.

They were getting stuff, empty bottles and doups to smoke, getting matches off men to light them.