refers to a song with a kindasimple lyrics, that's suitable for being sung. One of those songs that get stuck in your head pretty easily and make you sing it endlessly.
"Hey dude, this song has a catchy chorus, don't you think?"
"Yeah, it's rather singable"
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".