What is the meaning of the urban slang 'firecracker'?

Well, honey, a 'firecracker' in urban slang is typically used to describe someone who is feisty, energetic, and not afraid to speak their mind. They're like a little ball of explosive energy, ready to light up any situation with their bold personality. So, if someone calls you a firecracker, take it as a compliment and keep on shining bright!