The practice and theory of deciding which family a couple must visit during holidays throughout the year. More narrowly, it's achieving and exercising a position of power with both your significant other, your family, and his/her family to ideally get as much of what you want without disturbing the family dynamic.
Martin and Jane are working through the holitics of Christmas this year. They spent New Year's at his Mom's house, but she also wants Christmas Day. Jane's family wants Christmas Day as well, and so she suggests they spend Christmas Eve at his family. Martin, knowing Jane's mom will make life a holy hell if she gets snubbed, agrees.
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".