hell for leather
US /ˌhel fər ˈleðər/
UK /ˌhel fər ˈleðər/

1.
拼命地, 飞快地
as fast as possible; with great speed and energy
:
•
When the alarm sounded, everyone ran hell for leather out of the building.
警报响起时,所有人都拼命地跑出大楼。
•
The rider spurred his horse and galloped hell for leather across the field.
骑手策马扬鞭,拼命地驰骋过田野。