Ejaculating in a girl's belly button and leaving it there overnight.

innie = Wisconsin hot tub
outie = Caymen islands
"Dude, i totally gave this chick a Wisconsin hot tub last night!"

"be careful man.. my girlfriend got an infection from that once, but her outie poked through the surface and made it the caymen islands"
by OfficerSensei April 8, 2018
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A hot tub like structure made from a simple lawn chair in a shower.
John: Did you hear Dave got an urban hot tub.
James: How much did that cost him?
John: bout six dollars.
by campsell$ February 20, 2011
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Hinckley hot tub. A standard hot tub, periodically topped up by sweat and piss generated by own-brand supermarket lager.
A favourite leisure activity some parts of Leicestershire.
I can't be bothered to get out of the hot tub for a piss.
Never mind mate, do it in the tub we're all friends! Make it a Hinckley hot tub.
by MDP SUPREMO July 19, 2022
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A friend or close acquaintance who nurtures one's mother in the hot tub.
My friend's mother accepted my invitation to the hot tub. I am now my friend's hot tub daddy.
by Mandudeson March 9, 2018
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When you discover a public toilet that is slopping overboard with water-logged commercial-grade toilet paper, and feces recognizably the result of a two-bowl visit to HuHot.
I had to go so bad but the only open stall was a South Dakota Hot tub.
by Iseeu81mi July 2, 2022
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verb: The act of peeing in the pool or some other body of water
Mikayla: "Hey why is the water so warm"
John: "I was hot tubbing it."
Mikayla: "Ewwww"
by WaterWarmer34 September 8, 2021
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