expression, godan verb (-su)
kill time; waste time
Used when one has free time and does something to pass it, often with a slightly aimless or leisurely nuance.
電車を待つ間、スマホで暇を潰した。
I killed time on my phone while waiting for the train.
休みの日はよくゲームをして
On my days off, I often kill time playing games.