What is the collective noun for Bully?

There isn't a commonly accepted collective noun specifically for bullies.

However, you could use a more general collective noun that fits the context, such as:

* A pack of bullies

* A gang of bullies

* A group of bullies

* A horde of bullies

You could also get creative and use something more descriptive, depending on the situation:

* A swarm of tormentors

* A legion of intimidators

* A clique of harassers