not have a dog's chance 毫无机会；机会渺茫；毫无希望

【例句】
They do not have a dog's chance of buying a house this year because the bank has refused to lend them any money.
他们今年没机会买房子，因为银行已拒绝给他们提供贷款。

He hasn't a dog's chance of passing the exam.
他肯定考不过去。