hó͘-chhìn-thâu唬秤頭

to cheat customers by altering weighing scales

English Wiktionary, “唬秤頭” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%94%AC%E7%A7%A4%E9%A0%AD · confidence: Medium (Wiktionary)