a man who is never content is like a snake trying to swallow an elephant (idiom)
Definitions (粵典–words.hk)
語句
形容人過分貪婪，就好似一條蛇想吞咗成隻大象一樣 to describe one being too greedy; literally "a man is too greedy as if a snake wanted to eat up an elephant"
佢幫富商做法事賺左幾億都唔夠，仲想呃埋人地成份遺產，真係人心不足蛇吞象。
佢帮富商做法事赚左几亿都唔够，仲想呃埋人地成份遗产，真系人心不足蛇吞象。
keoi5 bong1 fu3 soeng1 zou6 faat3 si6 zaan6 zo2 gei2 jik1 dou1 m4 gau3, zung6 soeng2 ngaak1 maai4 jan4 dei6 seng4 fan6 wai4 caan2, zan1 hai6 jan4 sam1 bat1 zuk1 se4 tan1 zoeng6. He helped that billionaire to do religious rituals, earning several hundreds of millions already, but was still unsatisfied; he was way too greedy that he tried to defraud the whole inheritance of the billionaire.
Definitions (Wiktionary)
phrase, idiomatic
Being discontent is like a snake swallowing an elephant.
He helped that billionaire to do religious rituals, earning several hundreds of millions already, but was still unsatisfied; he was way too greedy that he tried to defraud the whole inheritance of the billionaire.