it is used to describe someone who tends to blame others for everything
Definitions (粵典–words.hk)
語句、俚語
話人成日推卸責任 to avoid responsibility; to deny one's guilt; literally: to have the surname 'Lai'
埲牆明明係你劃花嘅，你仲賴細妹，你姓賴架？
埲墙明明系你划花嘅，你仲赖细妹，你姓赖架？
It is obviously you who scratched the wall, and still you try to blame your sister, are you from 'Lai' family?
Definitions (Wiktionary)
verb, Cantonese
to have to habit of blaming on others
Examples (粵典–words.hk)
Cantonese
埲墙明明系你划花嘅，你仲赖细妹，你姓赖架？
埲牆明明係你劃花嘅，你仲賴細妹，你姓賴架？
It is obviously you who scratched the wall, and still you try to blame your sister, are you from 'Lai' family?