What do you mean by dumb luck?

Bad luck is ironic that you are lucky, or it can be said that bad luck is good luck.

I don't know why some good things happen, just like stepping on shit. It's rare and there's no reason. It happened accidentally, and it was not a good thing, so someone found money or something, which means he was lucky.

Because dogs mean luck to people, dogs are called lucky, so lucky but unreasonable things like changing money are called dumb luck. ?

The origin of dog excrement luck

In the old society of China, there were few chemical fertilizers in rural areas, and most of them were made from manure after fermentation. And people's feces are often insufficient, so there is a phenomenon of getting up in the morning to pick up feces. At that time, shit could also be sold, and people who picked up a lot of shit could sell more money. Later, people who can pick up shit every day are called dumb luck.