ˌalēˈüp, ˌaliˈyüp noun
Etymology: alteration (influenced by alley (I)) of earlier allez-oop , cry of a circus acrobat about to leap, probably from French allez , 2d person plural imperative of aller to go + English oop , alteration of up
: a basketball play in which a leaping player catches a pass above the basket and immediately dunks the ball ; also : the usually looping pass thrown in such a play