以债养债,借钱来还债。《歧路灯・第三十回》:“此时不肯当卖原好,若再揭起来,每日出起利息来,将来搭了市房,还怕不够哩!那才是揭债还债,窟窿常在。”
英语 borrow from Peter to pay Paul(rob ine's belly to cover one's back)