variants: or on someone's behalf
Definition of on behalf of someone
1 : as a representative of someone The teacher accepted the award on behalf of the whole class.
2 or US in behalf of someone or in someone's behalf : for the benefit of someone : in support of someone She spoke in behalf of the other candidate. They're willing to do anything on their child's behalf.
3 : because of someone Don't get up on my behalf.
Love words? Need even more definitions?Merriam-Webster unabridged
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