world's greatest athlete

(masculine, athletics, slang) the Olympic champion male athlete in the men's decathlon athletics track and field sport

(feminine, athletics, slang) the Olympic champion female athlete in the women's heptathlon athletics track and field sport (the pentathlon was replaced by the heptathlon in Olympic competition for women)

(historical, feminine, athletics, slang) the Olympic champion female athlete in the women's pentathlon athletics track and field sport (the heptathlon replaced the pentathlon in Olympic competition for women)