1) a Mexican hooked on crystal meth
2) the proper pronunciation of crystal Mexican by a Mexican hooked on crystal meth, as Meth rots the teeth and causes words to sound out different than a non Methhead speaker
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".