Bighead Supremacy Share definition Flag Something on ROBLOX which bigheads believe that they are better than normal heads. Which is racism. We should all be treated the same on ROBLOX. Torturing Roboxians as a Bighead is Bighead Supremacy. Bighead Supremacy by EthanGamerTVFans1138 (ROBLOX) August 10, 2019 Get the Bighead Supremacy mug.