2) A person who acts as though he might enjoy the practice of ass spelunking.
2) Goddamnit Jimmy, stop prancing around like a fucking ass spelunker.
A spelunker is an unexperienced person who has an interest in entering or enters caves.
Therefore, an Ass Spelunker is somebody who has an interest in exploring or does explore the cave-like orifice of an anus.
You love to fuck suzie in the butt, you ass spelunker!!!