When you urinate/deficate/throw up into a cup at night, then rinse it out and fill it with beverage of choice and serve to disliked houseguest the next morning. thus becoming morningcup.
I gave him morningcup to drink out of. i had just pooped in it last night!!!
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".