Is Hell for Leather an Idiom?

Hell for leather means as fast as possible. The term was first used in print in 1889 by Rudyard Kipling, specifically referring to riding a horse at breakneck speed. ... Hell-bent for leather describes someone who is determined to do something no matter what the cost, and does it in a ferocious manner.

What is the phrase hell for leather?

: marked by determined recklessness, great speed, or lack of restraint a cocky, hell-for-leather fighting man— H. H. Martin.

Is hell-bent an idiom?

hell-bent. Very determined to do something, perhaps annoyingly or recklessly so. She's hell-bent on coming here for Thanksgiving, so we better clean the guest room.