The act of rectal alcohol consumption by soaking a bowl of gummy bears in alcohol (preferably Vodka), mashing up the little gummies with a whisk and swirling the mixture to even it out, and sucking the drink into one's anus via a tube.
"Hey Chad, you can't drink tonight, you just got your wisdom teeth taken out!"
"Oh don't worry, I'll just gummybutt and be good to go."
"What's that weird sound coming from Chad's room?"
"Oh don't worry, he's just gummybutting. Chads love gummybutting."
"Yo Brad, wanna come over to my house and gummybutt with me before we watch hentai?"
"No thanks dude, I'm not Chad enough to do that."
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".