The definition you're reading right now, yes, this one, has the highest amount of thumbs down on urbandictionary.com. Therefore, it is the lowest rated definition on urban dictionary.
See also: poopies, weenie and picklebutt.
Norman: Wow, look at the amount of thumbs down on that definition! It must be THE LOWEST RATED DEFINITION ON URBAN DICTIONARY.
Christopher: *Gets in Norman's face* I'm going to find out where you live, break into your house while you're sleeping, tie you to your bed, and SLIT your THROAT.
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".