what does "mock shrug"mean?
Lady Bird tiptoed away. On the second floor, with Nellie, the atmosphere was quite different. The two women had been intimate friends for twenty- five years, the Governor was alive, and the very walls of bright orange tile seemed to encourage hope. Bird put her arms around Nellie and said, "He is going to get well." Remembering a recent death in the Connally family, she added, 'Too much bad has happened, he's got to get well." Almost fiercely Nellie replied, "He is, Bird, he's going to be all right." Her eyes filled up, and Jack Brooks, sensing that her brave front was about to crumble, handed her his handkerchief and said with a mock shrug, "Oh, he'll be out there deer hunting at ninety." She wiped her eyes and smiled faintly.