The chef who is second in authority in a restaurant or kitchen, ranking below the head chef.

Etymology:
French : sous, under + chef, chef

Example:

“The sous is in charge of the kitchen while the chef is not around.”

- Remy, Ratatouille (Disney Pixar, 2007).

Reference:

sous chef. (2009) . In Dictionary.com. Retrieved October 18, 2009, from
http://www.thefreedictionary.com/sous-chef.

Disney Pixar. (2007). In Ratatouille.