the head of the penis is slipped into a hole of a loose woven afghan or quilt, and you masterbate, resulting in your come to shoot straight up.
by Madmike the Malevolent January 27, 2007

Exactly like "prairie dogging" except for diahrrea. It is when you are holding in a violent case of the diahrrea shits, kind of like plugging a geyser.
by Preston J. Smith October 08, 2014

by RyanLee1224 November 15, 2017

A cum geyser is when 2 guys are having sex and they both get close to finishing and they put their cock heads together so that when they cum, it shoots up like a geyser.
by Nevets Cool kiss February 19, 2009

by urgrandpais2hot4u November 24, 2009

A sex act which involves a man defecating into a woman's mouth, then lying on his back while the woman then vomits directly onto his penis, forming a mound-like structure, not unlike naturally occurring geysers, around the base of aforementioned penis. The man then manipulates his own prostate, causing him to spray ejaculate into the woman's eyes.
by Fawlawl December 29, 2011

after having anal sex you take out your dick which leaves a gaping asshole. Next you put mentos and diet coke in her gaping hole making a fountain or GAPING GEYSER.
by Zud May 18, 2008
