Phrase used as a play on words; the word "shell" replaces "hell"; used to express excitement or exaggerated agreement in reply to a previous question or comment
Friend: "Hey Shelly, do you want to go to the beach today?"
Shelly: "Shell yeah!"
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".