humble pie (n.)

late 13c., of persons, "submissive, respectful, lowly in manner, modest, not self-asserting, obedient," from Old French humble, umble, earlier umele, from Latin humilis "lowly, humble," literally "on the ground," from humus "earth" (from PIE root *dhghem- "earth"). From late 14c., of things, "lowly in kind, state, condition, or amount," also, of persons, "of low birth or rank." Related: Humbly.

Don't be so humble; you're not that great. [attributed to Golda Meir]

"edible viscera of animals, entrails of a deer," c. 1300, noumbles, from Old French nombles "loin of veal, fillet of beef, haunch of venison," from Latin lumulus, diminutive of lumbus "loin" (see lumbo-).