Best Friends Forever (BFF) is a term used to describe a close, lifelong friendship. Gen Z often uses "BFF" in both online and offline conversations to refer to their best friends, signaling deep bonds of loyalty and companionship. The term gained popularity through text messaging, social media, and pop culture, and is frequently seen in hashtags, captions, and memes. BFF can also be used humorously or casually to refer to any close acquaintance, making it a versatile term for expressing friendship.