Put forth maximum effort, energy, and commitment. To try as hard as possible and hold nothing back in pursuing a goal or completing a task.
This phrase gained popularity in the early 20th century, particularly in sports contexts. It draws from the concept of giving everything one possesses - physical, mental, and emotional resources - without reservation or holding back.
The phrase captures the beautiful totality of human effort - not just trying hard, but emptying yourself completely into an endeavor. It suggests a kind of noble exhaustion where you can walk away knowing you left nothing unused.
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