…(of a bird or other winged creature) fly unsteadily or hover by flapping the wings quickly and lightly…
…a brisk, alternating, up-and-down movement of the legs when swimming with certain strokes, such as the crawl…
…the action of vibrating the tongue (as if rolling an r) in playing a wind instrument to produce a whirring effect…
…open and close one’s eyes rapidly in a coyly flirtatious manner…
