be run off (one's) feet
To be exceptionally busy, especially to an exhausting or exasperating degree; to be made to work very hard and very quickly. We have three parties of 40 scheduled for the dining room this evening, so all of our floor staff are going to be run off their feet. With three young kids, it's hard to remember a time when I wasn't run off my feet.
be run off your feet
If you are run off your feet, you are very busy. The poor girl was run off her feet with five children.
be run off your feet
be kept extremely busy. informalbe/get ˌrun/ˌrushed off your ˈfeet
be very busy: In the last few days before the holidays, the sales assistants were rushed off their feet.