Top Definition
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.
by Android March 09, 2005

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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.
by MrScience April 06, 2011

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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?

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