scud

v. (-dd-) 1 move straight and fast; skim along (scudding clouds). 2 naut. Run before the wind. n. 1 spell of scudding. 2 scudding motion. 3 vapoury driving clouds or shower. [perhaps an alteration of *scut]

v. i. To move swiftly; especially, to move as if driven forward by something.