When someone has anal sex with some ugly bitch and she sucks his dick right after. Later her and some other guy hook up and he kisses her poopy dick mouth, thusly receiving the poop dick mouth.
Puffins are more prone to poop dick mouth than most other animals.
Poop Dick Flakes(PDF) are when you have had anal sex with your penis. After sex, the poop on your penis will dry up. When the poop on your penis dries up, you start losing your boner and the poop wil flake off onto the floor.
A juicy, small sized turd nugget that is hanging from somewhere in the pubic region. The occurrence normally happens post anal sex with a partner who doesn't wipe real well; but there are also other applications.
Jill was going down on J-Rob when suddenly a Poop Dick Dingle Berry came to her attention. Immediately she removed her face from his crotch region and yelled, "That's not chocolate, fuck this shit I'm outta here!"