1. The act of evaluating or appraising or slapping together a loose proposal when you really ar not sure about it at all.
2. To calculate/guess roughly (the amount, extent, magnitude, position, or value of something).
3. Providing significatn room or 'fudge factor' for irregularities.
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".