have time on hands
have time on (one's) hands
To have extra or spare time in which one has nothing specific to do or accomplish. I'll have a bit more time on my hands now that we've finished the year-end audit. Our kids had too much time on their hands last summer break, so we decided to enroll them in a few different summer camps to keep them occupied.
have (too much) time on one's hands
Fig. to have extra time; to have time to spare. Your problem is that you have too much time on your hands. I don't have time on my hands. I am busy all the time.