run up phrasal verbphr v1run up a bill/expenses/debtsFINANCE to use a lot of something or borrow a lot of money, so that you owe a lot of moneyHe ran up thousands of pounds worth of debts using other people’s credit cards.
2FINANCE[intransitiveI] if share prices run up, they increaseThe stock price had run up just before the deal was announced.
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