ó͘-chhìn-thâu摀秤頭

to cheat customers by altering weighing scales

English Wiktionary, “摀秤頭” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%91%80%E7%A7%A4%E9%A0%AD · confidence: Medium (Wiktionary)