‘How’s the Josh?’ is my childhood memory: Uri director shares its origin

When I say 'Uri', what comes first to your mind. 'How's the Josh?' Right? But do you know the story behind this famous phrase from Vicky Kaushal starrer film? The director of the film, Aditya Dhar said that the phrase is his childhood memory. He had friends from defense background, so when with them he used to go to Army clubs, a retired Brigadier would say 'How's the Josh?' and they had to reply 'High Sir'.