It's called spelunking you dip shit.
When you add words to urban dictionary like sperlunking, you should make sure you got it spelled correctly moron.
The act of exploring a cave, or caves for entertainment. Often referred to as "Cave Diving"
I am going sperlunking next week in some remote areas.
(verb) to cuddle with your HUNNY; to get close to each other without having sex; to take a nap together
Dan: I'm sleepy
Amanda: Wanna sperlunk, hunny?