Having anal sex. "The leisure activity of going into underground caves and tunnels"
by Cave_enthusiast2 March 10, 2023
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When you eat an obese person out, and you have to dig around and dive to find the pussy.
Guy: Hold your fupa, I’m going spelunking in the cavern
Girl: Hold your breath
by paftdunk July 18, 2019
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A few guys hanging out or attending a social event with a substantially larger amount of girls. The opposite of a sausage fest
Did you see Aidan at the dance?
Yeah he was hard core spelunking, the lucky guy!
by Admiral ACHGbar September 21, 2015
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Hym "Then don't go spelunking with me you jackass! You sacks of shit have deluded yourself into believing that revenge is never justified no matter what you do to people and are flabbergasted when somebody suggests that, yeah, I would probably violently revenge you for that. It's not a contentious statement."
by Hym Iam February 23, 2023
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Unlike the legitimate definition, the underground meaning for this term is something along the lines of masturbation while on Xbox.
He was spelunking AGAIN!
by KS Meme Lord February 10, 2021
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The act of engaging in any form of rectal/anal penetration both medically or sexual in nature.
I went to my monthly physical, and my Doctor spent a good amount of time spelunking during his time below.

Last night my girl let me go spelunking for the first time in months. It was a rough time going deep in there.
by Millrunner80 August 4, 2018
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