roughshod
Concise Oxford English Dictionary © 2008 Oxford University Press:
roughshod/ˈrʌfʃɒd/
▶adjective archaic (of a horse) having shoes with nail heads projecting to prevent slipping.
– phrases
ride roughshod over arrogantly or inconsiderately disregard.
ride roughshod over arrogantly or inconsiderately disregard.
'roughshod' also found in these Oxford entries:

