FOB: Father of the Bride
BM: Best Man
MOH: Maid/Matron of Honor
B&G: Bride and Groom
RB: Ring Bearer
FG: Flower Girl
Gratuity/Service Charge: sometimes interchangeable, make sure you look closely at your contract to see if gratuity/service charge is already included in your contract (example: Here in Southern California, catering companies and venues typically charge between 18 and 22% service charge but do not expect additional gratuity after the wedding)
Tax: You all know what tax is, but just in case you weren't aware, this is in addition to the gratuity/service charge and isn't always charged by vendors
Bustle: When you bustle your dress, you basically are making it shorter so it is easier to get around during your reception. The bustle is typically done after the ceremony ad before the grand entrance. They can be found in the form of buttons, ribbon, or small hooks hidden within the dress. Make sure to ask your dress designer where you can find your bustle and how many hooks/ties there are so you can easily find them on your wedding day!
Charger: That is the pretty plate that goes beneath the dinner plate. Whether you are having a buffet or a plated meal, no plate is placed on the tables at each place setting until dinner is served. So the charger acts as a place marker while all of the photos are being taken and when your guests arrive! Some chargers are able to have meals placed directly on them, but most are not food safe.