waddle

v. (-ling) walk with short steps and a swaying motion. n. Waddling gait. [from *wade]

v. i. To walk with short steps, swaying the body from one side to the other, like a duck or very fat person; to move clumsily and totteringly along; to toddle; to stumble; as, a child waddles when he begins to walk; a goose waddles.