Meaning
'To give you bun' — to cheat on you, to be unfaithful in a relationship. 'Bun' (burn) is the infidelity itself; to 'get bun' is to be cheated on, and the person doing it is a 'bunna man' or woman. A heavy, common theme in dancehall.
Examples
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Shi find out him a gi her bun.
She found out he's cheating on her.
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Nobody nuh want get bun.
Nobody wants to be cheated on.
Origin
'gi' (give) + 'bun' (burn = infidelity). See [[bunna-man]], [[bun]].
How it’s used
To be unfaithful; 'get bun' = to be cheated on.