To move something quickly from side to side, or up and down, in short little movements — and also the movement itself. You waggle your finger at someone, waggle your eyebrows, waggle your hips; a dog waggles its tail. It can be used without an object too: the loose tooth waggled when she pushed it. The important flavour is that it is small, quick, repeated, and slightly comic. It is a friendly, informal, almost childish word — parents and children use it, and adults use it when they want to sound light-hearted. If you waggle your eyebrows at someone, you are hinting at something naughty or funny; if you waggle a finger at a child, you are telling them off but not seriously. It is also a real technical term in golf, where the waggle is the small back-and-forth movement of the club a player makes before hitting the ball, and in beekeeping, where the waggle dance is how a bee tells other bees where the flowers are. Compare 'wag' (usually a tail, and a bigger sweep), 'wiggle' (a squirming twisting movement), and 'wobble' (unsteady, about to fall).

（來回或上下地）晃動、擺動——動作小、快、有點滑稽；也可當名詞指這個小晃動。口語、輕鬆的字。狗搖尾巴一般用 wag；蜜蜂的「搖擺舞」就是 waggle dance。