Flat out
Meaning
To do something with maximum effort or speed, or to state something unequivocally.
Origin
In the early days of motor racing and aviation, engineers and drivers sought to extract every ounce of power from their machines. To achieve maximum speed, the throttle lever or pedal would be pushed as far as it could go—literally "flat out" against its stop or the floorboard. This direct, physical action of reaching peak performance with machinery quickly became a vivid metaphor for giving one's absolute maximum effort or speed in any endeavor, transitioning from the roar of engines to the everyday pursuit of excellence.
Examples
- She worked flat out for weeks to ensure the project was finished on time.
- He drove flat out down the empty road, hoping to make up for lost time.