When you hear a great song on the radio, and you love bacon, this phrase is appropriate. Similar to organasm of the mouth, or fiesta in your mouth, when you eat something especially delicious.
Wow, that song is bacon to my ears!
Yeah, I can smell, taste, and hear it sizzling now!
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".