If you run up a debt, you do things that cause you to owe a large amount of money:
She stayed two weeks at the hotel and ran up a bill that she couldn't pay.
to quickly make something such as a piece of clothing from material:
[ + two objects ] I can run you up some curtains in a few hours, if you want.
to make the price or value of something increase:
Heavy buying ran the price of stocks up higher than expected.
to raise a flag into the air on a pole or mast:
They've run up a British flag on the roof.
(Cambridge Advanced Learner's Dictionary & Thesaurus からの run something up の定義 © Cambridge University Press)
to increase a debt by spending more:
He ran up huge bills on clothes.
(Cambridge Academic Content Dictionary からの run up something の定義 © Cambridge University Press)
to continue to add small amounts to an amount owed until the total amount becomes very high:
run up a debt/loss/bill
(Cambridge ビジネス英語辞典 からの run sth up の定義 © Cambridge University Press)
- Cambridge Dictionary