A parasocial relationship is the one-sided feeling of knowing a celebrity, streamer, or influencer who has no idea you exist. Your kid might feel like a YouTuber is a real friend because they watch them every day. The word itself is academic and not slang; it became mainstream through internet discussions about fan culture. It is only concerning if it leads to obsessive behaviour, ignoring real-life relationships, or sending money to people who do not know them.