a high, lobbed pass to a teammate near the basket
to make a slam-dunk or to tip
the ball in
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'alley-oop'< Fr allez (imper. of aller, to go), used as interj. of encouragement, surprise, exhortation + oop < ?