Definitions by Northwood Zeek
Moon Jumping
The act of jumping onto someone's bed with your pants down and wedging their pillow between your butt cheeks and rocking back and forth vigorously.
Once a common practice in high school and college dormitories, moon jumping is sweet revenge for having been wronged. The full force of a moon jump will not be appreciated until your victim goes to bed. If you've done a poor job wiping yourself, the results can be fantastic.
Moon Jumping by Northwood Zeek December 9, 2011