🐝 Hornet
"Blow a hornets' nest wide open"
Meaning
To reveal a problem that makes many people angry.
About the hornet
Hornets react aggressively when their nest is disturbed, which is exactly the idiom about provoking a group into trouble.
Example sentence
The missing money blew a hornets' nest wide open at the club.
Test yourself
Which idiom means...
To reveal a problem that makes many people angry.