superathlete

From super- +‎ athlete.

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superathlete (plural superathletes)

1. A very skilled and successful athlete.
   • 2007 July 22, Gina Kolata, “Just a Bike Race, You Say? Think Again”, in New York Times‎^[1]:

     It’s funny to see these 20- and 30-year-old superathletes never standing up.