扣屎盔子

1. • lit. to cap in excrement

     northern dialect

2. • fig. to discredit with absurd unfounded accusations
3. • to vilify

Character by character

• 扣(kòu)fasten
• 屎(shǐ)feces
• 盔(kuī)helmet
• 子(zi)noun suffix, as in 椅子 yǐzi "chair"