Poo berg 

The tip of a piece of poo which pokes out of the water in the toilet bowl, like an iceberg in the ocean. But only this is poo, not ice. That is why it is called a poo berg.

I left a poo berg floating in there for you :)

Poo berg by Boogersnooky February 26, 2009

pooberg 

When you poo so much that some of the poo comes out of the water in the toilet. That is a pooberg

I pooberged the shit out of that toilet back there. Left it for the next person to admire too.

pooberg by Poo123Master December 4, 2018