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Portmanteau of excruciating and minutia.

When someone goes into so much unnecessary detail about something that it becomes excruciating to listen to.
Please stop boring me with the excrutia of your oral hygiene regimen.
by enoramous May 29, 2012
Excruciating minutia
The meeting took two hours longer than it should have as Bob delved into the excrutia of every aspect of the new deal.
by Urchingoat October 02, 2010