What does Gucci mean in slang?

I'm curious to know, could you possibly explain what the slang term "Gucci" actually means? It seems to be a popular phrase in certain circles, but I'm not entirely sure of its exact meaning. I'm hoping you might be able to shed some light on this for me. Is it related to the luxury fashion brand, or does it have a completely different meaning in slang? I'm really interested to find out.