a proverb which describes someone who does not even has a single specialized skill; 'jack of all trades, master of none'; literally 'there is not a single knife on his/her body that is sharp'
Definitions (粵典–words.hk)
語句
識好多樣嘢，但係冇一樣嘢特別叻 Jack of all trades, master of none; literally: knives all over one's body but none of them sharp
Definitions (Kaifangcidian)
什麼都只懂一點 – 什么都只懂一点
樣樣精通樣樣稀鬆 – 样样精通样样稀松
什麼都會一點但沒有專長 – 什么都会一点但没有专长
樣樣都懂一點但沒一樣精通 – 样样都懂一点但没一样精通
什麼都會一點但沒有一樣是拿手的 – 什么都会一点但没有一样是拿手的
Examples (粵典–words.hk)
Cantonese
周身刀冇张利
周身刀冇張利
zau1 san1 dou1 mou5 zoeng1 lei6
Jack of all trades, master of none; literally: knives all over one's body but none of them sharp