It means to calm down and be patient. Often in races horses would start before the gun or bell sounded, and a phrase came about "hold your horses"
hold your horses is a figure of speech saying clam down or take a chill pill.
The same as hold your horses
Britches, or breeches, are pants used in riding horses. Meaning hold onto your pants. Can also mean the same thing as "hold your horses"
Holding your horses means you pull up on the reins and slow them down -- it means for you to slow down and be patient.
The hardware store owner told the impatient customer "Hold your horses, I'm coming!" Though you might be anxious to know how you did on the test, you will have to hold your horses until all of the papers are graded.
Hold Your Horses - 1921 was released on: USA: 28 January 1921
Hold Your Horses - 1929 was released on: USA: 16 January 1929
Hold Your Horses - 1954 was released on: USA: 13 March 1954
The cast of Hold Your Horses - 1954 includes: Art Gilmore as Narrator
The cast of Hold Your Horses - 1929 includes: Ned La Salle as Ike
hold your horses
This comes from horse racing. They used to not have racing gates, and the horses would of course, as they do now, get very excited. So the people there would say to the track helpers, "hold your horses" because the horses were excited and they didn't want them to get away.
The idiom "hold your horses" means to not rush into something too quickly, or to wait. It's origins date all the way back to ancient Greece. The first documented usage appears in Homer's Iliad.