When some one smokes cannabis and as they get stoned there jaw hangs a bit open and seem unable to keep there mouth closed due to the effect of the drug.
A person that is just living their life without putting any effort into it. Just eating, sleeping, fucking and shitting. No ambition, no goals, just living.
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".