roughshod

The phrase "to ride roughshod over" describes behavior that is forceful, overbearing, and uncaring. It suggests a clear disregard for other people's feelings, rights, or well-being, usually by someone using power or authority to get their way. The image comes from the old practice of shoeing horses for slippery ground. A horse was called "rough-shod" when its shoes were made to give extra grip. That helped the horse keep its footing, but it also created the picture of something hard and damaging crushing whatever was underneath.

To ride roughshod is more than simply being rude. It means pushing past people, overriding them, or "trampling" their views in order to reach a goal, with little care for the result. For example: "The developers rode roughshod over environmental concerns to finish the project," meaning they ignored those concerns and moved ahead anyway. Or, "He bulldozed his way through the meeting, riding roughshod over everyone's opinions."

It is often used for situations where someone in a position of authority abuses that power. A ruler might ride roughshod over the civil liberties of the people, or a large company might ride roughshod over smaller competitors. The phrase has a strongly negative meaning and suggests a cold lack of empathy.

So, if someone behaves like a heavy horse trampling everything in its path, ignoring whatever is fragile around them, they are riding roughshod. It is a vivid image of dominance and a harsh willingness to cause harm while pushing toward one's own goal.