A term used to specify something completely useless. Something that isn't worth a dime.
"Man, I feel like I just graduated underwater basketweaving!"
"Why don't you go practice your underwater basketweaving!"
by Truero December 2, 2005
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the friggen sweetest sport ever created... yeaaaaah. Played with 2 teams of 6, a hockey puck, fins, masks, snorkel, water polo cat, gloves, and sticks. It is played on the bottom of the pool while holding your breath. More addicting than crack.
Michigan State rocks at underwater hockey.
by DO and Gunner November 1, 2006
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First, one must conduct the steps necessary to make the Alaskan pipeline viable (shit in a condom, freeze it).

The Underwater Volcano is when a female voraciously pleasures herself with an Alaskan Pipeline whilst in the bathtub and on her period.

Created by A. UoS 2015.
Dan: Hey Mary, fancy fucking later?

Mary: Sorry Dan, I'm on my period! I think I'll just give the Underwater Volcano a try tonight

Dan: No problem, I've heard the Underwater Volcano is a fantastic experience, enjoy!
by ACL1380138 February 3, 2016
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A great experience, very pleasurable. But if you don't finish fast enough you drown, so be brief.
Guy 1 : I had underwater sex with my girlfriend last night.

Guy 2 : Dude isn't that dangerous?

Guy 1 : Nah man, It was so hot I came in like thirty seconds.
by KryptonKonnor November 7, 2013
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1. an act of oral copulation involving the insertion of the penis into the toothless orifice of a female geriatric, whereupon, with her head completely submerged underwater, the act consummates with the geriatric fully satiated with seminal fluid

2. the imbibing of semen, from the male member, entirely underwater, in a jacuzzi or pool, by a feeble, elderly female.
Ex.:"I was about to climax into this bitch's mouth, when her Gma sauntered out, told the cunt to move over, grabbed my prick, and started sucking it to high-heaven, without ever coming up for a fuckin' breath of fresh air; the bitch gave me a fuckin' underwater gummy!"
by Michelleobama42 September 3, 2014
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I believe a better term for wanking in the tub would be "Bathturbation"
Last night Dan had a bath and performed Underwater Jacking aka Bathturbation
by lizard_lightning March 20, 2015
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To jack off under water in the tub where no one in the house can hear it. Plus it feels really good
Son - Mom I need to take a bath.
Mom - But hun, you just took one?
Son - I need to go underwater Jacking
by ItsMaybeEthernet March 10, 2015
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