One who explores the deepest,darkest recesses of someone's crap cave.
As I went butt spelunking in Suzy, I think I shot a wad into her upper intestinal tract.
by rev. ray April 8, 2004
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Verb: The act of spreading the butt cheeks, and diving into the butt hole tongue first.
Hooked up with a chick last night, and she loved it when I went butt spelunking.

Dude, I went butt spelunking for the first time...bitch needed to clean out dat canyon.
by Stoop Fontain March 14, 2014
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Verb: The act of spreading the butt cheeks, and diving into the butt hole tongue first.
Hooked up with a chick last night, and she loved it when I went butt spelunking.

Dude, I went butt spelunking for the first time...bitch needed to clean out dat canyon.
by Stoop Fontain March 14, 2014
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A person or persons who enjoy exploring another persons anal cavity
Thomas and robert are experienced butt-spelunkers, every day they enthusiastically explore eachothers anal cavities with many tricks and techniques!
by RandomPlatypus June 12, 2018
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