Definition
Did Not Finish—the three letters that haunt endurance athletes more than their credit card statements. Whether from injury, exhaustion, or existential crisis at mile 18, it's the official stamp of 'tried but couldn't.'
Example Usage
After training for six months, Sarah had to DNF at the marathon when her knee gave out at mile 20.
Origin
Racing and endurance sports official terminology for competitors who start but don't complete events
Fun Fact
In ultramarathons, DNF rates can exceed 50%, making finishing at all more impressive than your actual time.
Source: Endurance racing and competition terminology
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