1. [early–mid-19C] a showy, fast horse.
2. [early 19C+] a red-haired or sandy-haired person; also as adj.
3. [mid-19C+] high spirits, verve, vigour.
[1920s] to treat brusquely, to ‘make someone jump’.
[late 19C] to a great extent.
excl. used when touching something hot.
[mid-19C] (US) excl. of approval, encouragement.