Definify.com

Webster 1913 Edition

Adj.

Shod with shoes armed with points or calks;

as, a

roughshod

horse

To ride roughshod

to pursue a course regardless of the pain or distress it may cause others.

roughshod ‎(not comparable)

(of a horse) having hooves shod with calks or horseshoes that have projecting nails to prevent slipping
(by extension) brutal or domineering
- 2005, Edmund White, My Women, The New Yorker, June 13, ,
  In the roughshod horny world of boys, I had studied my companions closely to make sure that I wasn’t being too “queer” for them.