Ganso bomb is an Powerbomb in professional wrestling.
Translated literally from Japanese as Originator Bomb but in English more commonly referred to as the original powerbomb, this move sees the attacking wrestler bend an opponent over and grab them in a belly to back waistlock before then lifting the opponent until they are vertical. The attacking wrestler then drives the opponent down on their neck and shoulder while either remaining in a standing position, sitting position or dropping down to their knees. The move is considered one of the most dangerous moves in wrestling as the person taking the move is in freefall, dropped onto their own head or neck without protection.
For a long time, the only widely known instance of this move being used intentionally was its appearance as a counter move in a single All Japan Pro Wrestling match, where Mitsuharu Misawa countered a Toshiaki Kawada powerbomb with a headscissors. However, Kawada remained standing, allowing Misawa's own momentum to put him into the proper position for the move. The rarity of the move added to its mystique as a legitimately dangerous spot, and for a long time it was regarded as one of wrestling's most dangerous moves as well as one of the most damaging within storyline contexts.
The move is also known as the Hangman's DDT; this name was invented and popularized by two video games, WWF WrestleMania 2000 and WWF No Mercy, which were developed by AKI and released on the Nintendo 64 in the United States. Having previously developed Japanese wrestling games featuring Toshiaki Kawada (such as Virtual Pro Wrestling 2), AKI left the move, along with many other Japanese moves, in the US games they developed as a bonus feature. However, most Americans didn't know what the Ganso Bomb was or even that "ganso" was a real word, so calling it by its original name in an American game would have sounded like Engrish. The name "Hangman's DDT" was thus concocted.