Having anal sex. "The leisure activity of going into underground caves and tunnels"
Bro, I was spelunking that chick yesterday.
The act of licking/sucking ones elbow
Im spelunking my mon
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
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!
Or/to; Spelunk, To put both the penis and the balls in ones mouth; particularly when the penis is hard and inserted into the throat.
"Hey Jenna, Brad took me spelunking this weekend :P"
"I would totally spelunk him/her"
"If its not too big, I'm gonna spelunk it :3"
Needless to say don't fucking do this with me.
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."
Unlike the legitimate definition, the underground meaning for this term is something along the lines of masturbation while on Xbox.
He was spelunking AGAIN!