“My cousin used to bring his video games and we would play until the cows came home.” 「従妹がゲーム機を持ってきて、いつも遅くまでゲームをしていた。」


If you do something for a long time, with no end in sight, you do it “until the cows come home”. Of course, cows usually don’t go on day trips into the city. But imagine that the cows go to town and don’t come back until late at night.