動詞
自己一個人喺未經人同意下，拎晒屬於大家嘅財產 to take exclusive possession of sth; to have sth all to oneself
你想獨吞啲錢？
你想独吞啲钱？
You want to have the money all to yourself?
我同佢合作做生意，但係賺咗錢之後佢就想獨吞。
我同佢合作做生意，但系赚咗钱之后佢就想独吞。
He tries to take all the profits by himself, ignoring the fact that we are partners.
Definitions (Wiktionary)
verb
to take everything along and not share with others (syn.) 獨享, 独享
Definitions (Kaifangcidian)
（沒有對應漢語詞彙）
Examples (粵典–words.hk)
Cantonese
你想独吞啲钱？
你想獨吞啲錢？
You want to have the money all to yourself?
Cantonese
我同佢合作做生意，但系赚咗钱之后佢就想独吞。
我同佢合作做生意，但係賺咗錢之後佢就想獨吞。
He tries to take all the profits by himself, ignoring the fact that we are partners.
Examples (Wiktionary)
Mandarin
那种“一人独吞”、“人莫予毒”的派头，不过是封建主的老戏法，拿到二十世纪四十年代来，到底是行不通的。
那種“一人獨吞”、“人莫予毒”的派頭，不過是封建主的老戲法，拿到二十世紀四十年代來，到底是行不通的。
nà zhǒng “ yī rén dú tūn ” ， “ rén mò yú dú ” de pài tóu ， bù guò shì fēng jiàn zhǔ de lǎo xì fǎ ， ná dào èr shí shì jì sì shí nián dài lái ， dào dǐ shì xíng bu tōng de ．
Such attitudes as "I and I alone will take everything" and "no one dare harm me" are nothing but the old tricks of feudal lords which simply will not work in the Nineteen Forties.