putsch \PUCH ('u' as in 'push')\ (noun) - (Sometimes capitalized) A secretly planned and suddenly executed attempt to overthrow a government.

"A 'putsch' is like a... It's like a coup... an insurrection. The Nazis tried to take over Munich. It was unsuccessful. They threw Hitler into jail." -- Faye Kellerman, 'Street Dreams'

Putsch comes from German, from Middle High German, literally, "thrust."