Superlative form of gutsy; having the most courage, boldness, or daring of all.
From 'gutsy' plus the superlative suffix '-est.' Represents the highest degree of the guts/courage metaphor in English.
When we call someone 'the gutsiest,' we're saying they're the most 'belly-full-of-courage'—it's a visceral compliment that ties morality directly to a physical location in the body, showing how embodied our language for character really is.
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