Below are some terms that are frequently used on a film set. 
FAVORED NATIONS (does not apply to Studio Teachers)The term Favored Nations refers to a negotiated agreement which generally indicates that if other employees in a specified show receive better terms than this individual, then this individual employee will be entitled to those same terms. (It does not mean that everyone in the show is being paid the same.) For such an agreement to be valid and enforceable, it should be in writing.
FRENCH HOURThis term applies to meals that are eaten while working and therefore allow the employer to avoid a meal penalty. No meal breaks! Food is passed out on set and crew stuff it down whenever and wherever they can. This is not allowed for minors.
FORCE MAJEURE (fors mah-zhur)Chance occurrence, unavoidable accident. It is a common clause in contracts that essentially frees both parties from liability or obligation when an extraordinary event or circumstance beyond the control of the parties, such as a war, strike, riot, crime, or an event described by the legal term Act of God prevents one or both parties from fulfilling their obligations under the contract. 
NDB (non-deductible break)This is usually a free breakfast given to crew members to align everyone’s meal break to avoid meal penalties
ABBY SINGER SHOTThis is the second last camera setup (not necessarily take) of the day. This was named after A.D. Abby Singer, who always called out last two shots so the crew knew to start packing up and close to wrap. 
MARTINI SHOTThis is the last setup for the day (announcing they were close to wrap)