Definition
无底洞 literally means 'bottomless cave' but is almost always used metaphorically to describe something that consumes endless resources, time, or money — a black hole. You hear it for expensive projects, high-maintenance hobbies, or any demand that can never be satisfied.
n.
bottomless pit (literal or figurative)a black hole (for money, resources, etc.)
Examples
- 无底洞，。Zhège xiàngmù jiù shì gè wú dǐ dòng, tóu duōshǎo dōu bú gòu.This project is just a bottomless pit; no matter how much you invest, it's never enough.
- 无底洞，。Jiā lǐ de kāixiāo jiǎnzhí shì gè wú dǐ dòng, yǒngyuǎn tián bù mǎn.Household expenses are practically a bottomless pit; they can never be filled.
- 无底洞，。Tā duì xīn shǒujī de xūqiú jiù shì gè wú dǐ dòng, yǒngyuǎn xián bú gòu.His demand for new phones is like a bottomless pit; he always complains it's not enough.
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