Definition
To do something with great speed and energy; as fast as possible.
全速地，飛快地
Upon hearing the alarm, they ran hell for leather towards the exit.
一聽到警報，他們就飛快地朝出口跑去。
He drove hell for leather to get to the airport on time.
他飛快地開車以準時到達機場。
The athletes were running hell for leather in the final stage of the race.
運動員們在比賽的最後階段飛快地奔跑。