as an oldtimer, I believe that "defenestration" came from the Yugoslavia as the Stalinists purged the Party from those that wouldn't toe the line.
Petra Hanáková tells us:
This situation culminated in 1419 with the First Defenestration of Prague, in which Hussites threw 7 members of the Czech Town Council out of Prague's New Town Hall window--and to their deaths on the points of Hussite-wielded pikes below. To make the situation more interesting, King Wenceslas IV had an apoplectic fit and died of a heart attack upon learning of the defenestration.
Radio Prague adds:
They began their rebellion in grand Czech style, with the Second Defenestration of Prague in 1618. In this second defenestration, two vice-regents of the Austrian monarch and some governors of the Czech lands were thrown out of a tower window at Prague Castle. They were not killed, however, as they fell onto a pile of garbage (mostly straw) which had accumulated in the castle moat.