Definitions
1.VerbTo arrange in a rack."At the start of the game, the referee racks up the red balls.; If you rack up, I'll break."
2.VerbTo gain (points etc.; in a game or sport), to accumulate."Chelsea racked up another 3 points at home to Bolton."
3.VerbTo acquire, to gather together."By the age of 18, he had already racked up thousands of dollars in debt."
4.VerbTo defeat severely, to thrash.
5.VerbTo collect one's chips and cash out.
6.VerbTo attribute, chalk up.