roached adjective2 •(US) Having a style of trimming a horse's mane so that the hair stands straight up from the neck, similar to the natural growth pattern of a zebra's mane, or a mohawk haircut on a human. •Of hair: cut or styled in such a way that it stands straight up.Andrew Jackson, with that long head of his and that unroached forelock, looked a good deal like a neglected horse in the face. — 1916