Flappity

Jest then in come Mrs. Pelto with one of them French sisters with the flappity caps, the same as 'ad been in the mornin', and come from the 'Ospital.

‘Flappity, flappity, flappity,’ the thin man sang. ‘Cut it out,’ Grissom said.

... I was mindful of the hissings and shoutings coming from the cave and thought an interesting foreign gentleman would be a good distraction for them, even if he did land up going flappity, flappity down the mountain on little webbed feet.