It's called a bridlepath. Or if you mean shaving the mane, it means to 'hogg' the mane.
Bridlepath ---- Shaving a horse's mane is called roaching (or hogging, in some parts). A Bridlepath is a path along a canal (or similar) intended for use by horses.
If you are talking about shaving about a 1-inch section of mane behind the horse's ears, that's called a bridlepath. It is the area that the halter or bridle sits on.
This is called the mane. The hair that dangles between a horse's ears is called the forelock.
The bare spot where you shave a horse behind the ears is called a "bridle path". It has that name because it clears a path on the horse's neck for the bridle to be worn without getting tangled in the mane. There are different styles of bridle paths, from only cutting a tiny bare spot, to shaving the mane from ears to half-way down the neck. When the entire mane is shaved off, the mane is "roached." So when you shave the horse's mane right behind the ears, it's called "cutting a bridle path." And when you shave the entire mane off, it's called "roaching the mane."
The Poll
This is called a bridle path.
A shedding blade, also known as a grooming blade or currying blade, is commonly used to remove loose hair from behind a horse's mane. This tool helps to keep the horse's coat sleek and healthy by removing dead hair. It is important to use the shedding blade gently and with care to avoid irritating the horse's skin.
You are creating a bridle path for the headstall of the bridle, so the straps don't get tangled in the horse's mane and pull the horse's mane out.
There are different degrees of shortness when it comes to a horse's mane. For Western Pleasure and Hunt Seat classes the mane is 'pulled' to about 3-4 inches. It shows the horse's neck better in competition. When the horse's mane has been shaved off it's called 'roach or roaching'. This used to be the norm for roping horses so their manes didn't get caught as the rider threw the lasso. And of course different breeds have their own styles and how they like their horses to look.
it's mane in English
hair on the back of a horses neck is called their mane..