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.