ride roughshod over
ride roughshod over {v. phr.}
To do as you wish without considering the wishes of (another person); treat with scorn or lack of courtesy; show no sympathy for.
The city officials rode roughshod over the people who did not want their homes torn down for a new school.
The boss rode roughshod over the men when they asked for higher wages.
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Source: A Dictionary of American Idioms