time thief

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time thief

A person or thing that distracts or takes time from more useful or productive activities. I'm trying to catch up on work after being out sick, but my inbox is such a time thief. I'll call my mom back later—she can be a real time thief, and I need to finish up this essay.
See also: thief, time
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.