打盹儿nod off/snooze/ take a nano nap/ take a little catnap; 打瞌睡doze off; 小睡catch a wink; 睡得很沉sleep like a log/be a heavy sleeper; 睡觉容易醒be a light sleeper; 去睡觉hit the sack/hay; 睡一整天sleep around the clock.