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1. Hammerhead
A shit so large it feels like the head of the hammer is coming out of your ass but then tapers of nicely for sweet relief.

Practicing lamaze techniques during this process if helpful.

WARNING:
The hammerhead can cause bleeding so don't be alarmed.
Now I know what having a baby feels like, I just dropped a hammerhead in the bowl.
2. Smudge Baby
A "Smudge baby" is born when a man or woman without pants (or with crotchless pants) is sitting on a sofa, and shits on the sofa and it smudges all over it.

Originating from a chinese pop song. Lyrics can be found here:

http://lyrics.robby.haryan.to/song.php?id=5257
Phil looked at Matt and observed drily, "Mark just birthed a smudge baby all over your sofa."

3. Danny Glover
a turd so horrific that the turdee may not survive to do another; an "im getting too old for this"shit; a lethal weapon.
just birthed a Danny Glover in there, feels like my arse is inside out now
4. cannonballer
Used to describe taking a dump with such velocity that your ass is splashed with water, resembling a cannonball hitting the water. Typically a result draft beer and fast food.
I went to the bar last night then ate a quarter-pounder, then birthed a cannonballer this morning.
5. octoclog
When you take a dump that wraps itself around the toilet bowl about 8 times.

Alternatively refers to a dump that ranges from 8 inches to 8 feet in length.
I love pizza rolls but the octoclog I just birthed almost killed me.

you: What the hell is that smell?!?
me: my bad dude, that last octoclog burnt my ass and my nose.
6. corn jacket
Human excrement. Basically, when you eat corn, about 13 hours later, it comes out your ass looking the same way it went into your mouth. But, on the way out, it needs a jacket. That is what the turd wrapped around your shat out corn is. The poop keeping my old corn kernels warm is a corn jacket.
I was at a BBQ yesterday and today I birthed a corn jacket. (IE, my poop was studded with corn.)
7. Two Headed Turtle
Taking a shit while wearing a thong. Possibly while drunk.
That chick I met at the bar last night was so drunk she squatted in the alley on the way back to my place and birthed a two headed turtle!
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