gregging

{Verb}: Cave Diving Term:
1. To repeatedly hit your tanks on the top of a cave while scuba diving (cave diving).
2. To continually drag your tanks/manifold across the top of a cave while scuba diving.
3. To notch out the edge of a ledge with the leading edge of your valve manifold.

"You were gregging the cave so much it's a foot taller in there now!"

by BBQ Master February 10, 2006