poop curtain

the long hair or fur on the back of the canine thigh that creates a curtain-like effect while the mammal arches its back and drops a deuce. said fur hides the excrement that protrudes from the canine's bung

Watch out Stephen, the wind is blowing. You don't want to get poo on your poop curtain.

Daisy is so ladylike that she's always sure to use her poop curtains when dropping the deuce.