0 past simple and past participle of waddle
1 (usually of a person or animal with short legs and a fat body) to walk with short steps, moving the body from one side to the other:
Choosing a key from a ring which hung round his fat waist, the guard waddled past a number of cells.
It smelled, waddled and dove for fish like a duck.
He has turned his back and waddled away from them, and he will not be forgiven for doing that.
The following day, during lunch, another waiter opened a tureen, and to his surprise, all the ducks waddled out.
This explanation would cover sightings of lake-monsters on land, during which the creature supposedly waddled into the loch upon being startled, in the manner of seals.