An Eirnin is someone who is an active person, and is very dedicated in relationships, you either love him or you hate him. He’s a funny guy but he doesn’t let his emotions out. He shows a different person for every other person he meets.
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".