I don't know who needs to hear this today, but if you walk out of your job while saying you "quit," your employer is probably going to take you seriously.
You might think that this is some pretty straightforward logic, but some people learn that kind of lesson the hard way. One Reddit user shared a story about a former co-worker of his, whose temper was a little too volatile at times. When the coworker threatened to quit, the Reddit user took it seriously. The user, who goes by bubblehead_maker shared the full story to the Malicious Compliance Subreddit, and it's actually kind of amazing.