Did you know flip flops were once called flip flaps? In fact, they’re known by many names. In Australia, they’re called ‘thongs’, which can cause serious confusion to non-Aussies. If an Australian says, “you’re thong is really dirty”, don’t take offence. In Japan they’re called ‘zori’, and their popularity soared in Western countries when American soldiers brought them back from the war. Still, they’re popularity goes back millennia. They’re considered to be the oldest form of footwear, as rock paintings depict prehistoric man rocking the humble flip flop.