Lucky Girl Syndrome is the act of convincing yourself that you already live a blessed life where everything you manifest comes to you easily.
By telling yourself that you are a lucky girl (or lucky man, or lucky person), you train your brain and your soul to attract more luck into your life.
I learned about this from the user ByMichelleDiaz on TikTok. In her video, she describes how she gives a talk about Lucky Girl Syndrome to her clients.
She explains that lucky girls believe amazing things are going to come into their lives because that is just how they live.