lead a dog's life这个短语用来形容人过着贫困潦倒、惨不忍睹的生活。

【例句】
He has been leading a dog’s life since he got divorced.
他自离婚后，就一直过着贫困潦倒的日子。

Mike has been leading a dog's lifesince he got divorced.
迈克自从离婚后就一直过着困苦的生活。