Which artery is called the widow maker?

There are number of things that have that name: a very famous sniper (novel), or even a dead branch caught dangerously high in a tree which may fall on a person below.
Some people call the left anterior descending artery the "widow maker". Of course, cardiologists give it a medical name: the left anterior descending (LAD) coronary artery.
There are three arteries that run over the surface of the heart and supply it with blood. There is one artery on the right side and two arteries on the left side of the heart. The one on the right is known as the right coronary.
On the left side, which is the main side, we have the left anterior descending (LAD) that runs down the front of the heart and supplies the front and main wall, and then the left circumflex that supplies the side wall.
No one knows exactly who came up with the term, but the reason they did is likely that if that artery is blocked right at the beginning, then the whole artery after it goes down.
And this means that the whole front wall of the heart goes down. As far as heart attacks go, this is a big one, with big consequences if not dealt with appropriately; it’s why doctors take it so seriously.