Focus on the pronunciation of rack sth up
English definition of “rack sth up”
rack sth up — Phrasal Verb with rack
/ræk/ verb [T]
› to gradually gain a large amount of something: The government and debt counsellors believe it is too easy to rack up large numbers of loans. The company's dozen vehicles rack up 144,000 miles a year. He'll rack up $10,000 in bonus money.rack sth up into sth Try to rack these small returns up into modest but consistently positive returns.