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1) Noun: A spring characterized by intermittent discharge of water ejected turbulently and accompanied by a vapour phase (steam). Wikipedia.com

2) Verb: A method used to get drunk fast, while remaining classy: Pour a large amount of hard alcohol into a cup, Grab cup with right hand and your bottle/can/container of chaser with your left. Chug the alcohol in the cup, immediately pour the chaser into the cup and chug that. slang
Ew that girl just took a handle pull and she has herpes. I was going to take a handle pull, but now I will geyser it.
geyser by thefunkySmonkey May 12, 2013
The skin around your butthole. The geyser is to the butthole what the areola is to the nipple.
I havent showered in a week my geyser is itchy.
Geyser by Gabey baby May 18, 2014
A bloke who's a bit hard and thinks he's the dogs bollox.
That geyser just pinched my birds arse.
Geyser by B January 22, 2004
someone who drinks excessively and then ejects a column of vomit into the air
Dude...did you see that Candace chick that puked all over the bar on her 21st birthday?

Yeah, she got kicked out for being a geyser.
Geyser by Your Mom May 9, 2004
The sexual act when a male urinates in a female's anus and she in return flatulates, expelling the urine in a blast similar to the geyser of the American West

When expelled with less force or with a different liquid, see water fountain
"Katie shot me in the face with her geyser yesterday."
geyser by The Big Man011 October 22, 2006
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.
I did a geyser watching porn Thursday, it was awesome.
geyser by Madmike the Malevolent January 27, 2007