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An act of extreme stupidity. Causes shame and disgust in witnesses.

Etymology - 18th Century German slang, used by onlookers towards men who would fall into the milling machine.
"Julie Bishop is an excellent symbol of feminine intellect."
"Nice Millerbock, idiot."

"What's that thing that's like a tuba, but wraps around the body?"
"It's called a Sousamaphone."
"Did you just Millerbock?"
by Estebanramirezxoxo September 05, 2014
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