riding boot

a knee-high boot of black or brown leather, without fastenings, forming part of a riding habit.

Origin of riding boot

First recorded in 1850–55

"This fire burns brightly," I said, kicking the logs together with my riding-boot.

In Kings' Byways |Stanley J. Weyman
These he compares with Mr Wegg's leg; that gentleman looking on, as if he were being measured for a riding-boot.

Our Mutual Friend |Charles Dickens
It was on one of these that Ricky had left her mark in the clean-cut outline of the sole of her riding-boot.

Ralestone Luck |Andre Norton
Up from the top of one riding-boot the butt of a revolver protruded slightly.

Little Eve Edgarton |Eleanor Hallowell Abbott

The third he merely opened, and knocked the doll-head bolt of the grip up with the heel of a riding-boot.

Life's Handicap |Rudyard Kipling