An individual who exhibits profound stupidity, incompetence, idiocy or lack of common sense on the water, in a boat, a kayak, or other watercraft. A dumb boater.
Did you see that seatard crash into that buoy?
Destroying something by peeing on it
The snow was melted by urinahilation.
The dog killed the house plant via urinahilation.
An automobile moving at least 10 mph below the speed limit and braking too much.
I'm late because the car in front of me was driving super pussy slow.