Shit atoll 

A turd which is of sufficient size and mass that it naturally sits at the bottom of the toilet bowl, but with a portion which sits proud above the water line and in doing so mimics a small atoll or island.

A true shit atoll is not supported by the sides of the toilet in any way but is completely 'free standing'.

After not having a crap for two weeks I produced a prize winning shit atoll last night.

Shit atoll by Ryd June 25, 2006

Apollo Shit 

The act of taking a dump in pieces, or a unique multi-stage bowel movement. Usually happens when experiencing a dry shit. Bonus points for 'splashdown' effect.

I thought I was done before leaving the bowl, but I had to return to launch position to leave another two logs. It was a typical 'Apollo Shit" situation.

Apollo Shit by Canadia99 August 26, 2012