keep tabs on


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Related to keep tabs on: knuckle under, ring hollow, run ragged, rough it

keep tabs on

Observe carefully, keep a record of. For example, I hate having my boss keep tabs on my every move, or We've got to keep tabs on outgoing mail so we can keep track of postage. This expression uses to tab in the sense of "an account." [Late 1800s] Also see keep track.
See also: keep, on, tab

keep tabs on

Informal
To observe carefully over time: Let's keep tabs on expenditures.
See also: keep, on, tab