do (one) a/the world of good

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do (one) a/the world of good

To have a very positive effect on someone or something. If you're feeling sad, getting out in the sunlight should do you a world of good.
See also: good, of, world

do somebody/something a ˈpower/ˈworld of good

(old-fashioned) do somebody/something a lot of good; benefit somebody/something: She’s under a lot of stress at work, and a few days at the coast would do her a power of good.