At first glance, the post seems relatively unspectacular: Corey writes his congratulations to a photo of the birthday boy Kylie. But the last line causes a stir among observant Kardashian-Jenner fans. “Thank you for everything and my beautiful grandchildren! Rav what’s up,” the 41-year-old ends his words, triggering big question marks. Who is Rav and why does Corey use this name in connection with his grandchildren?
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