Noah Lyles is a true world champion ... crowned the "World's Fastest Man" after winning the 100m dash -- months after he told NBA champs to stop calling themselves world champions.
The Olympian just took gold in the men's 100m in a heart-stopping finish ... narrowly edging out Jamaica's Kishane Thompson by .005 seconds to win Olympic Gold.
In fact, the race was so close commentators initially thought Thompson won ... before the photo finish proved otherwise.
With Lyles' win, he takes home the gold and the unofficial title given to the winner of the Olympics 100m -- "World's Fastest Man" .