The Cambridge Dictionary has named ‘parasocial’ its Word of the Year for 2025, marking a year dominated by online obsession, celebrity intimacy, and the emotional bonds between humans and AI. This term, defined as ‘involving or relating to a connection that someone feels between themselves and a famous person they do not know,’ has surged in popularity as people worldwide form one-sided relationships with influencers, celebrities, and AI chatbots. From Taylor Swift’s romance to Lily Allen’s confessional lyrics, parasocial behavior was everywhere in 2025. Social media amplified this trend, with fans dissecting every detail of their favorite fictional characters and YouTubers experiencing intense fan behavior. Even AI chatbots weren’t immune, as users confided in them like friends or therapists. Despite its modern internet origins, the term dates back to 1956, when sociologists described TV viewers’ one-way relationships with on-screen personalities. The Cambridge Dictionary’s choice reflects the cultural mood, as ‘parasocial’ captures the essence of 2025, blending academic and mainstream contexts. However, psychologists warn of unhealthy parasocial relationships, while experts highlight the potential for healthy admiration and connection. As the Dictionary adds 6,000 new entries, including ‘delulu’ and ‘slop,’ it showcases the evolving language of the digital age, mirroring the emotional and cultural shifts of 2025.