/ ˈbærək; NAmE / verb [ v , vn ]
1.
( BrE ) to shout criticism at players in a game, speakers at a meeting, performers, etc.
2.
barrack (for) sb ( AustralE , NZE ) to shout encouragement to a person or team that you support
► bar·rack·ing noun [ U ]
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WORD ORIGIN
late 19th cent.: probably from Northern Irish dialect.