Ghost Boating 

The act of setting a boat at low throttle and leaving the helm to dance around, stand at the bow, or even enter the water (licensed ghost boaters only).

We returned the boat with a hole in the hull and had to explain that we'd been ghost boating...

Ghost Boating by GeniusSex August 5, 2018

ghostbating 

Masturbation in plain sight, nearly undetectable to anyone, even upon closer inspection.

No one knew I was ghostbating during the commercial breaks of South Park.

ghostbating by Stricker March 13, 2008