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1.
The king of all poops, in which when one goes to wipe one's nether regions after letting one fly, one discovers much to one's surprise that THERE IS NOTHING ON THE PAPER. The single most satisfying bowel movement that man is capable of.
1: What are you smiling about?

2: Oh nothing, just had...a ghost poop!

1: *stunned silence*
by m luv March 02, 2004
 
2.
a poop that mysteriously disappears after plopping into the toilet
by Anonymous October 18, 2003
 
3.
There are three popular definitions of ghost poop:

1: This is when you feel like you need to take shit, but when you go, nothing comes out or you merely fart. This is explained by having too much air in the colon from having eaten gassy foods like beans or swallowing air, or by you having very bad constipation.

2: You sit down to take a shit, everything feels normal, but when you look down into the toilet the poop appears to be gone! This is explained easily however. You merely had a very heavy turd that went strait halfway down the drain, so it's out of sight, but still very much in the toilet.

3: You take a shit and everything goes normally, but when you wipe, the paper comes out clean, much like how a ghost leaves no trace. There are two explanations depending on the ease of your shit. If the shit was relatively easy, then congrats! You're getting the perfect amount of fiber in your diet, not too much, not too little. If the shit was really difficult, then the turd was way too hard, and you need to eat some prunes pronto.
1: Man, I thought I needed to take a monster shit, but all I did was fart and make a ghost poop on the pot.

2: Woah! Where did my shit go?! Must've been a ghost poop...

3: ARRRGHH *plop*... *pant pant*... "Oh well, at least it came out as a ghost poop and I won't need to wipe..."
by zeemeister April 23, 2011
 
4.
The poop that slips right out and hides in the flush passage as the bottom of the bowl. The poop producer looks into the bowl, and finds that the turd magically disappeared.
I sat down to crap, and by the time I stood up to examine my handiwork, I saw that it was an invisible ghost poop.
by Aikidokaratefan May 12, 2014
 
5.
When after pooping, you go to wipe and there is nothing on the toilet paper.
"Dude that was such a quick poop!"
"It was a ghost-poop thats why."
"Ohhhhh I love those"
by buttmonkey930 July 11, 2013
 
6.
When you take a shit but have nothing to wipe; most people follow this up with a couple of safety strokes just in-case.

The eerie and mysterious phenomenon of pooping without leaving any trace of such on your butt, giving a "too-clean-for-comfort" feeling.
"Fuck, I'll be right back man I had a ghost poop earlier today so I hardly wiped but now I'm starting to smell the stank... shit"
by Whelp September 18, 2011
 
7.
After you unload your watse (for the weak-minded, your crap) you take that Charmin Ultra (again for the simpletins, your poop paper) and cleanse your anal (for urbanites, your pooper) and after looking at your art, only THEN you relize, there is no residue there! (for the average-Joes, no poop on the paper)
Saddie- "Yo, Macy get in here! look at my poop!"

Macy- "Dude, look at the paper!"

Saddie- "There's nothin' there! How does that even happen?!"

Macy- "Don't even worry about it, that's just a ghost poop
by Ninja Panda! May 13, 2011