Fixing something completely random or unspecified. In most cases, if "shit" is replaced with "stuff", the sentences remain equivalent. If a possessive pronoun, like "your" or "their", is used between "fix" and "shit", this changes the meaning of "shit" to something along the lines of "mess", this often is referring to a personal mess, but also could be a social mess or physical mess.
Frank: "My parents aren't home, do you wanna come over?"
Evelyn: "I'm fixing shit right now, but I'm coming as soon as it's taken care of."
Daniel: *spills beans on the floor*
Claire: "You should probably fix this shit before someone slips and gets hurt."
Bob: "I lost all my life savings and the house because of a bet."
Alice: "You seriously gotta fix your shit man."
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".
I don't buy the schmegegge about Morty sleeping with Moira.
His version of the story was pure schmegegge.
The whole schmegegge was made up to get Liz a little bit of attention.