be on top of (something)

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be on top of (something)

To be in complete control of something; to be fully informed or up-to-date about something. A: "How is the new project going?" B: "Right on track! Jen was on top of it while you were on vacation." I don't know how you're always on top of all the different student issues that are brought to your attention.
See also: of, on, top

be/get on ˈtop of something

be able to manage and control problems and difficulties successfully: I’ve finally got on top of my new job but it took a long time.
See also: get, of, on, something, top