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general::
Phrase(s): Don’t worry (about a thing).
Do not become anxious about something.; Everything will be all right. • "Don’t worry, Fred," comforted Bill, "everything will be all right." • Bill: I think I left the car windows open. Sue: Don’t worry, I closed them. • "Don’t worry about a thing," the tax collector had said. "We’ll take care of everything." Or was it "We’ll take everything?"
McGrawhill's American Idioms And Phrasal Verbs