When you work at a job long enough, you get to know parts of it that most people generally don't know about like how people who work at restaurants know not to order the "chef's special" because they know that it's generally just a coded way to say "stuff that was gonna rot if we didn't use it today." Here's a list of various other insider secrets
from a variety of different jobs and industries, so that you can feel like a cool cat with all this privileged information.
Want more? Check out these Bosses Who Fail to Understand the Real World>