fast break

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A rush by offensive players, as in basketball, toward the goal in an attempt to score before the opposing defenders are in position.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun basketball An offensive play in which a team, having won possession of the ball, moves the ball downcourt as quickly as possible, attempting to get an easy shot before the defense can set up.