Bread-And-Butter Meaning

Example: Used other than as an idiom: see bread,‎ and,‎ butter.
  bread-and-butter pudding
Relating to basic sustenance or the requirements for everyday living.
2015, Robert Crane, ‎Christopher Fryer, Crane: Sex, Celebrity, and My Father's Unsolved Murder (page 34)
  These road warrior plays were fronted by former semistars like Forrest Tucker or Hugh O'Brian, who had had their bread-and-butter TV shows cancelled. The job could pay $3,000 to $5,000 a week […]