Dither
Part of speech: verb
Definition: To be uncertain or unable to make a decision about doing something. To do something nervously. To render an approximation of (an image, etc.) by using dot patterns in similar colours to those that are unavailable on the system.
Flap
Part of speech: verb
Definition: to move something broad and loose back and forth, as flap its wingsto move loosely back and forth
Part of speech: noun
Definition: Anything broad and limber that hangs loose, or that is attached by one side or end and is easily moved; as, the flap of a garment.A hinged leaf, as of a table or shutter.An upset, stir, scandal or controversyThe motion of anything broad and loose, or a stroke or sound made with it; as, the flap of a sail or the flap of a wingA disease in the lips of horses.A hinged surface on the trailing edge of the wings of an aeroplane.Vagina