Kind of stool that you go "arrghhh" when pushing out but when you look in the toilet they are gone, disappeared, vanished in troubled waters...
- Who just destroyed the toilet?
- I did, soz.
- Dude, must've been terrible looking. You should've taken a photo of it and sent it to Guiness records.
- I didn't get a chance, was a pirate ship poo...
A pirate-selfie is the kind of a selfie, what you make with your friends, but without changing to front-facing camera, thus photographing the sun/ceiling/the floor/random people.
-Hey guys, gather around, I'm making a pic! Say cheese!
-What are you doing? You are taking pictures of the ceiling, not us!
-Yes, 'cause it's a pirate-selfie!
-Oh okay, then.