A term typically used to apply to people when they are dressed too gaudily for a given occasion. It is believed that when Africans were brought to America as slaves, they thought they were going on a cruise and wore their best clothes. When they landed, they found out that it was all for nought.
Look at that Persian all dressed up at the DMV. He is such a FOSS!
You're wearing Gucci, Armani, Dolce & Gabbana, and Christian Dior all at the same time? You are an incredible FOSS!