Rapidly and energetically; all-out, flat out: Frank and Pat had gone hell-for-leather over this territory
[1889+; origin unknown; perhaps related to British dialect phrases go hell for ladder, hell falladerly, hell faleero, and remaining mysterious even if so, although the leather would then be a very probable case of folk etymology with a vague sense of the leather involved in riding tack]
[hel-boks] /ˈhɛlˌbɒks/ noun, Printing. 1. (def 9).
[hel-brawth, -broth] /ˈhɛlˌbrɔθ, -ˌbrɒθ/ noun 1. a magical prepared for an evil purpose, as in black magic.
[hel-kat] /ˈhɛlˌkæt/ noun 1. a bad-tempered, spiteful, woman; shrew. 2. a woman with magic powers derived from evil sources; witch. /ˈhɛlˌkæt/ noun 1. a spiteful fierce-tempered woman n. also hell-cat, “volatile woman,” c.1600, from hell + cat. noun A volatile and dangerous woman (1605+)
/ˈhɛlɪ/ noun 1. (Greek myth) a daughter of King Athamas, who was borne away with her brother Phrixus on the golden winged ram. She fell from its back and was drowned in the Hellespont See also Phrixus, Golden Fleece