peek in on (someone or something)

peek in on (someone or something)

To go in some place to have a very quick or cursory look or examination at someone or something. I just want to peek in on the office and make sure everything is running smoothly without me. A: "Should we go back and peek in on the kids one last time before we go out?" B: "No, the babysitter has everything under control."See also: on, peek