gōng-chîⁿ戇錢

money wastefully spent on something expensive

money wastefully spent on something expensive or useless; wasted money; pointless expense

English Wiktionary, “戇錢” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%88%87%E9%8C%A2 · confidence: Medium (Wiktionary)