Social media phenomenon Big John always attracts a crowd but predicts his final stop of his tour down under at the races in Perth this weekend to be the rowdiest yet. John Fisher — who goes by Big John — has developed an insane following of more than 567,000 fans on Instagram, most famously for his voracious appetite of Chinese food and his catchphrase “bosh”, meaning “life is good.” The internet personality has become an icon among teenagers and young adults and will be taking to Ascot Racecourse on Saturday as part of his Australian and New Zealand tour, far…