Basically taking some action to indirectly signal dissatisfaction rather than directly confronting it. This could be many things. As the article says, it could

Basically taking some action to indirectly signal dissatisfaction rather than directly confronting it. This could be many things. As the article says, it could be as simple as procrastination. It could also be something more insidious, like Bob works late every evening, so Sally forgets to feed Bob's dog in the morning.