turtle licking
The act of licking a small poo which is protruding from your partners anus. When the poo gets sucked in, you stop, but when the poo pushes out again you lick it. It's sort of like "Whack-a-Mole" but instead of using a hammer you're using your tongue, and instead of a mole it's a poo, and instead of a game at Chuck-E-Cheeses it's an anus.
I went "turtle licking" last night and my girlfriend really got into it.