Superlative form of sporty: most sporty.(adjective)
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Use "sportiest" in a sentence
"The sexy new design of the all-new S60 has been described as the sportiest Volvo ever."
"What does that even mean? we have a populace that "cares about basketball", too, but that doesn't make us one of the "sportiest" cities in the nation."
"With a population of just over 200,000, this charming city on the Adriatic fancies itself as one of the "sportiest" per capita in the world."