FBC stands for various things depending on the context. Could you clarify which one you’re referring to? Here are a few possibilities:

Federal Building Code: Regulations for construction and safety in federal buildings.
Fire-Breathing Chicken: A fictional or whimsical term, possibly from a game or story.
Futuristic Battle Command: A concept related to advanced military or strategic operations.
If you have a specific context in mind, let me know!