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peestyle 

When you are rapping while you pee
Hey man! Did you check out Watsky's sick peestyle? He did it during his "Watsky Longest Freestyle World Record Attempt for COVID Relief" stream!
peestyle by xdeers May 6, 2020

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 

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

prostyle 

Adjective meaning the best, master, godly, no substitute etc...
See Kryzto, SEQ, Slusher
Jeanelle: Who is Slusher anyway?
Kryzto: Slusher is Prostyle.

Kryzto: I just pwnd some noob who chose mids in cutthroat.
Slusher: Prostyle
prostyle by Tim Slusher May 9, 2006