I. | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adverb
: in a hell-for-leather manner : at full tilt : hell-bent
galloped hell-for-leather down the trail
II. adjective
Etymology: hell-for-leather (I)
: marked by determined recklessness or great speed or force : rip-roaring
she swept down the dizzying descent with the verve and hell-for-leather dash of a man — Time
III. noun
: wild abandon or frantic haste
became surer of his music … learned … to take it easy when the crowd did not demand hell-for-leather — Harold Sinclair