Dictionary.net

a brushing or rustling sound

elegant and fashionable; "classy clothes"; "a classy dame"; "a posh restaurant"; "a swish pastry shop on the Rue du Bac"- Julia Child

a brushing or rustling sound

To flourish, so as to make the sound swish.

To flog; to lash.

To dash; to swash.

A sound of quick movement, as of something whirled through the air.

Light driven spray.

To move with a rushing or whistling sound.

Such a rustling sound, or the movement that makes it; as, the swish of a cane.

To move with a whistling sound, as a whip.