RACK STH UP
UKUSrack sth up
—Phrasal Verbwithrack(••/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.