Stealthy poo is where you put toilet paper down on the water so that the poop doesn't make a sound nor does water splash at your ass.
"Wakes up in the middle of the night"
You:Damn I need to shit !
You:If I take a shit now its going to get my butt wet and might wake someone up
You:I'll take a "StealthyPoo" !
"Takes a Stealthypoo with a clean non-wet butt and without making a sound"