humble pie. noun. Metaphorically, the dish we eat when we have to admit we were wrong or retract a statement in humiliating fashion. I assumed the origin was humble as in not proud or of low origin, but it’s not! In fact, the humble in humble pie comes from umble pie, with umbles being the innards of an animal, usually a deer. In other words, a low-class food, allowing the punny humble pie to emerge. Umbles itself comes from the Middle English numbles (offal).
“…I came home just as Dodger was serving up a massive humble pie, stuffed with livers and heart and tripes in a simmering, rich brown gravy that was as thick as custard.” (Cory Doctorow)