Poop Trickle 

A light trickle of poop that drips from your sphincter after a warm gust of flatulence.

I was holding in a fart all day, and eventually it poop trickled into my underpants.

Poop Trickle by Waxy Lincoln December 31, 2011

poop tickles 

When you poop so much that the poop fills up the toilet bowl and tickles your ass cheeks

After that burrito, I went to the bathroom and had the worst case of poop tickles

poop tickles by Lil breezy April 20, 2015