A pompous personage of reduplicative cognomen is insufficiently tenacious of a mural perch. Notwithstanding the intervention of a royal entourage—equids included!—ooclasm proves irremediable.
This is a highfalutin synopsis of what familiar children's rhyme?
Solution
Burrito!
Congratulations to yesterday's solvers Inca, Maddy, Charlie, Jacob C., Yana, Dr. Yetman, and Zachary S. Thanks to everybody who made a guess!
Ten years later, Dr. Shapiro revived Puzzle of the Day at Proof School, writing each day's puzzle on a name tag. After 600 puzzles or so, he was just starting to feel normal about students reading his chest all the time when campus closed and the puzzle, like the rest of our lives, moved online. New puzzles are posted daily on school days.
Want to catch up on old PotDs? There's an archive currently containing puzzles from March to June 2020.