v.1. To accumulate or score a number of something: The home team racked up 64 points. Our team did badly in the first half, but in the second half we really racked the points up.
2. To set up billiard balls for a game of billiards or pool by placing them in the rack: He racked up the balls at the start of the game. She picked up the balls, racked them up, and cued off.