Slang definitions & phrases for on one's high horse
on one's high horse
Behaving arrogantly and pompously
[1805+; the form ride the great horse is found by 1716]
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with on one's high horse
In an arrogant or condescending manner. For example, When they started talking about music, David got on his high horse and said that classical music was only fit for museums and archives. This expression, alluding to the use of tall horses by high-ranking persons, dates from the late 1700s. Similarly, off one's high horse means “less arrogantly, more humbly,” as in I wish she'd get off her high horse and be more friendly. It dates from the early 1900s, but is heard less often today.