1. moved forward with a series of up-and-down motions, like a porpoise jumping in and out of water
Usage: past tense and past participle of porpoise; often used to describe vehicles, boats, or animals moving with a bouncing motion

Examples

• The speedboat porpoised across the waves as it accelerated.
• The dolphin porpoised gracefully through the ocean.
• The car porpoised down the bumpy road.
• As the ship hit rough seas, it porpoised up and down.
• The jet ski porpoised along the water's surface.
• The horse porpoised over the uneven terrain.