Sounds awfully fishy. Billionaire entrepreneur Mark Cuban may be known for his bold business moves, but his latest diet confession even sends his own 16-year-old son fleeing from the kitchen. During an appearance on Robin Arzón’s “Project Swagger” podcast at South by Southwest, the former “Shark Tank” star called the three-ingredient meal “disgusting” but effective in getting his protein. While Cuban previously followed a vegetarian diet to extend his lifespan, he recently moved to a