Watch the video above to see some of the hand signals.
These secret communication signals could be something as simple as a server straightening his lapel or given hand signals.
The next time you are in your favorite restaurant, notice how your waiter communicates with other restaurant workers.
According to Washington Post food critic Tom Sietsema, each hand signal has a different meaning. What seems to be a mundane hand gesture might mean something big.
The hand gestures are better to use than yelling across the room or taking the time to walk back to another server who is not close by.
Here is a list of things to notice the next time you are dining out:
1. Fingers positioned in a sideways V means a VIP is in the restaurant.
2. Pointing to a ring finger indicates the guest is celebrating an anniversary.
3. Pointing to a belly-button area lets means the guest is celebrating a birthday.
4. Holding the hand horizontally signals flat, bottled water.
5. Making a fist with the thumb sticking out signals tap water.
6. Fluttering with fingers means the guest would like sparkling water.
7. Holding the palm forward means to bring more bread.
8. Using one hand to brush the shoulder means a table needs cleaning.
9. Placing one hand on his lapel means he needs help.
If you really think about it, customers use hand signals also. They don't yell when they want a server's attention. They usually hold up a finger or point to an empty glass.
While this list is about restaurant workers, other organizations have their own signals and buzz words.