When a turd is so long that it arcs across the hole in the bottom of the toilet bowl and has both ends sticking out of the water. When flushed it bends in half.
You may feel free to add wads of toilet paper to simulate the whipped cream on top or next to the "shitnana".
I took a dump this morning and with the toilet paper all around it and stuff, it looked just like a shitnana-split laying there in the bowl.
Whilst one man is having a standard shit wank, a second man sits on his lap cowboy style and shits between his legs, whilst simultaneously jerking them both off with theirs cocks pressed up against each others
I was having a sneaky shitwank when my man lover Plunky sat down on my lap and joined me for a good ol nullagine tandem cowboy shitwank of monstrous proportions. We simultaneously owned the toilet whilst setting off jizz fireworks all of the bathroom ceiling