time-waster

1. Someone who wastes their own time or the time of others.

   I showed him round the property thinking he was a prospective buyer, but in fact he was just a time-waster.

2. (idiomatic, informal)Something unproductive.

   Email was supposed to improve business efficiency, but all too often it turns out to be a time-waster.

3. Something which passes the time that may or may not be seen positively.

   This puzzle book is a good time-waster when my train is late.

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