idle away
To waste an interval of time in laziness or inactivity. A noun or pronoun can be used between "idle" and "away." Don't idle the whole day away, or else you'll be up all night finishing your science project. I idled away a few hours and then got back to my research.
idle something away
Fig. to waste one's time in idleness; to waste a period of time, such as an afternoon, evening, one's life. She idled the afternoon away and then went to a party. Don't idle away the afternoon.
idle away
v. To spend some period of time not working or avoiding work: I idled the day away. The children idled away the summer.