verb

As a verb, "barrack" means to shout encouragement, approval, or disapproval, usually at a public event, such as a sports game or political rally. In this context, "barrack" is most commonly used in the UK, Australia, and New Zealand.

Example

1. The crowd began to barrack for their favorite team as the game got underway.
2. The audience barracked the politician as he took the stage to deliver his speech.
3. The supporters of the opposing team barracked the referee every time he made a decision they disagreed with.