Small, stupid, bullshit details that nobody cares about. A frequent component of mansplaining.
"Don't ask gramps where the salt is in the kitchen. He'll launch into a ten-minute diatribe of manuretiae about the history of salt."
To keep doing something stupid, even when you know it's bullshit.
"Cut the crap, you know you're wrong. Repeating it over and over is just manuretia."
"Scholars might refer to it as the 'sunk cost fallacy', but I prefer to call it manuretia."