This is a way of sarcastically saying no way?! or really?! or of Course!...but it is completely sarcastic so you dont even have to have a tone with it. The word speaks for itself.
This phrase thrived during the late eighties to early nineties in elementary schools through high schools. It is a way of saying "I already knew that, and am surprised this information is new to you."
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".