The bunker moment is any moment in time when your overconfidence runs out and you know you're going to lose, experience failure or humiliation.

The bunker moment is a reference to the Soviet occupation of Berlin in 1945 at the end of the World War 2, when Adolf Hitler and the Nazi leaders hid in the Führerbunker knowing that they're going to lose the war.
"This is the bunker moment for Trump. He knows he's going to lose the elections. He has given up."
by DaisyTheCatgirl November 6, 2020
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