Definitions for "Porpoising"
leaping clear of the water when surfacing to breathe, while at the same time moving forward at speed.
The term used when the boat almost wallows through the water rather like a dolphin (or porpoise) 'hops' in the water. This is normally a result of improper trim settings, poor weight distribution or bad design.
Leaping out of the water while speeding forward.
A term used to describe the up and down movement of an RV when traveling.