scud / skəd/ • v. (scud·ded, scud·ding) [intr.] move fast in a straight line because or as if driven by the wind: we lie watching the clouds scudding across the sky three small ships were scudding before a brisk breeze.• n. 1. chiefly poetic/lit. a formation of vapory clouds driven fast by the wind. ∎ a mass of windblown spray. ∎ a driving shower of rain or snow; a gust. ∎ the action of moving fast in a straight line when driven by the wind: the scud of the clouds before the wind.2. (Scud) (also Scud mis·sile) a type of long-range surface-to-surface guided missile able to be fired from a mobile launcher.