Penistalsis 

The motion of a penis across great distance by the staggered contraction of muscles along its length

Help , I'm being chased by a penis!
How is it moving?
Penistalsis!

Penistalsis by farticorn September 18, 2014

peristalsis 

Rhythmic visceral muscle contractions in the digestive system that function to transport ingested materials caudally, unless stimulated by the emesis reflex where the flow of digested material is reversed.

Dude, last night Veronica's peristalsis was inhibited by my massive cock.

peristalsis by CheesyBear November 7, 2014

reverse peristalsis 

An inaccurate alternative term for regurgitation or vomiting, typically used by grade school science teachers who don't actually understand science and use the urban dictionary instead of a competent textbook to source classroom material.

While reverse peristalsis in the small intestine can occur during vomiting, the actual act of vomiting does not involve peristalsis.

The technical term for vomiting is not reverse peristalsis it is regurgitation.

reverse peristalsis by MrScience April 25, 2011

reverse peristalsis 

n. the act of vomitting. (Peristalsis being the sequence of muscular contractions that moves food down the esophagus, the reverse of which would bring food up the esophagus.)

Sam drank too much. He's in the bathroom engaging in reverse peristalsis.

reverse peristalsis by Android March 9, 2005

external peristalsis 

that act of moving the chips in the bag without actually touching them

Oh that guy is eating his chips using external peristalsis

external peristalsis by dashoaa February 24, 2008

Paristalsis 

Paristalsis is defined as a potentially life threatening condition whereby excessive consumption of white bread, particularly baguettes, antagonises peristalsis and the normative operation of the lower digestive tract

Doctor: Your son's coma was induced by an overconsumption of french bread, which acted as a sort of glutenous cork obstructing the colon, rendering normal peristalsis completely ineffective. This caused a backlog of semi digested food in the stomach and small intestine that exerted a tremendous pressure on little Jimmy's fragile little brain, causing a massive stroke. I'm afraid that we are going to have to surgically remove the obstuction.

Concerned parent:Oh dear God!

Doctor: Don't worry, Paristalsis is extremely common in france and the procedure is really quite routine.

Parent: Ah, I see. Is that why Parisians often seem so braindead?

Doctor: Actually, yes.

Paristalsis by boogaling December 28, 2012

Reverse Peristalsis 

One of the best HardCore band ever!Pukie Head Productions.
Dave-Don-Vig-Jayson. R.P.= NJ/HC
1988-1991

Did you hear REVERSE PERISTALSIS'S DEMO"THE NIGHTIME,SNIFFLING,SNEEZING,COUGHING,ACHING,STUFFY HEAD,FEVER SO YOU CAN REST DEMO?

Reverse Peristalsis by Erik Nutra-Sweet Kills Vigtec OS101 October 24, 2003