(Revelation 14:8) A second Angel followed, calling out, "Ruined, ruined, Great Babylon ruined! She made all the nations drunk on the wine of her whoring!"
(Revelation 16:19) The Great City split three ways, the cities of the nations toppled to ruin. Great Babylon had to drink the wine of God's raging anger--God remembered to give her the cup!
(Revelation 17:5) A riddle-name was branded on her forehead: GREAT BABYLON, MOTHER OF WHORES AND ABOMINATIONS OF THE EARTH.
(Revelation 18:2) his voice thunderous: Ruined, ruined, Great Babylon, ruined! A ghost town for demons is all that's left! A garrison of carrion spirits, garrison of loathsome, carrion birds.
(Revelation 18:10) They'll keep their distance for fear they'll get burned, and they'll cry their lament: Doom, doom, the great city doomed! City of Babylon, strong city! In one hour it's over, your judgment come!
(Revelation 18:21) A strong Angel reached for a boulder--huge, like a millstone--and heaved it into the sea, saying, Heaved and sunk, the great city Babylon, sunk in the sea, not a sign of her ever again.
(Revelation 18:24) The only thing left of Babylon is blood-- the blood of saints and prophets, the murdered and the martyred.
The term is a reference to the fact that in the Torah (AKA the Old Testament) the Babylonian Empire forcibly relocated the Jews from the Land of Israel to the city of Babylon, where they were forced to stay for around 50 years. This situation is seen as analogous to the forced deportation of Africans to the Americas by Europeans.