pàng-chóa-hó͘放紙虎

to defame someone through leaflets, posters

to defame someone through leaflets, posters, etc.; to blackmail someone

English Wiktionary, “放紙虎” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%94%BE%E7%B4%99%E8%99%8E · confidence: Medium (Wiktionary)