"Yes, Chef": No matter what you're saying or asking, I hear you.
"Heard": I acknowledge what you said.
"Behind": I'm walking behind you, so please don't back up or turn quickly because one of us probably has a piping hot pot of something.
"Corner": I'm coming around the corner, so be aware.
"All Day": This is how many of a particular menu item we have.
"86": We're running low or out of a dish, so cut it from the menu.
"Hands": Someone (often a server), please come grab this food and deliver it to the customer while it's hot.
Chit: A receipt, order ticket, tab, or IOU
Consommé: A clear soup made from rich stock that has been clarified, using egg whites to remove fat.
Cartouche: A "lid" made from parchment paper used for covering the surface of stews, sauces, braises, and more.
In the weeds: Overwhelmed with work.
Escoffier-style French brigade: Famous French chef Georges-Auguste Escoffier devised this hierarchy system that many modern restaurants use today. Positions include Chef Executif, Chef de Cuisine, Sous Chef, Chef de Partie, and Commis Chef.
Family meal: Also known as staff meal, this is when everyone sits down to eat before service.
Knocking on the walk-in door: Hey, I'm coming in (or out), so watch it.
Staging or Trailing: Shadowing, cooking, and essentially interviewing at a restaurant in hopes of getting hired, but also to see if the restaurant is a fit for you.