Definition of roughshod adverb from the Oxford Advanced American Dictionary

 

roughshod

 adverb
adverb
NAmE//ˈrʌfʃɑd//
 
 
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Idioms
ride/run roughshod over somebody/something
 
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to treat someone badly and not worry about their feelings; to ignore laws, people's rights, etc. run roughshod over local laws (=ignore local laws)
See the Oxford Advanced Learner's Dictionary entry: roughshod