(phrase)/(adj.) not interested in; not concerned with; indifferent towards; none of one's business; something that doesn't concern oneself; to stand aloof from things that are of no personal interst; to let things drift on the grounds that they do not affect one personally; to not bother to intervene; not in the least concerned about something
Definitions (粵典–words.hk)
動詞
完全唔理一個人或者唔管一件事 to be indifferent about something; to not give a damn
我揾佢幫手但係佢就闊佬懶理。
我揾佢帮手但系佢就阔佬懒理。
ngo5 wan2 keoi5 bong1 sau2 daan6 hai6 keoi5 zau6 fut3 lou2 laan5 lei5. I sought help from him, but he didn't give a damn.
Definitions (Wiktionary)
phrase, Cantonese, idiomatic
to be indifferent; to not give a damn