hell-bent for leather

== English == === Etymology === Apparently a blend of hell-bent +‎ hell-for-leather, though sometimes said to have been initially applied to animals which behaved poorly as if they were bent on being turned into leather. === Adverb === hell-bent for leather (not comparable) (Behaving) determinedly recklessly, in a manner that lacks restraint. Synonym of hell-for-leather (“very fast”). Synonym of hell-bent (“(recklessly) determined”).