jù​wén​chéng​léi

to have small things cause a big disturbance

聚蚊成雷 jù​wén​chéng​léi
to have small things cause a big disturbance
Literally many mosquitoes buzzing together like thunder; used metaphorically to describe how accumulated rumors, slander, or small grievances can lead to serious consequences or widespread harm

Frequency

Written text
0.003 per million

Sources

Frequency data
BCC Corpus (BLCU)