up to something : Popular Idioms in English

up to something

Plotting something secretly

Donald pressed his ear to the door, trying to listen in on Shirley's conversation. He knew she was up to something and he was determined to find out what it was.

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  • Wake up with the WPBF Alarm Clock app!
    Want to wake up to something different from your current alarm? Download the WPBF Alarm Clock app today! It's a custom wake-up call with live traffic maps, detailed weather forecast and late-breaking news headlines, not to mention a pleasant greeting from one of your favorite WPBF 25 News Mornings personalities! Check it out and download it right here: iTunes | GooglePlay
    July 29, 2013 - WPBF Palm Beach