A "password child" is a slang term referring to the child whose name a parent uses as their online password, implying that they are the favorite child. It is a phenomenon that has gone viral on social media platforms like TikTok, where kids are using it to find out if they are the favorite child. The term is also defined as the child who is perceived to be the familys "obvious favorite" because their name or birthdate is used as the majority of their passwords. It is common knowledge that older parents are notoriously bad at remembering passwords, which is probably why they use the same thing repeatedly. The concept has sparked sibling rivalry and led to discussions about favoritism in families.