Right after Michael Phelps won the 8th gold medal, Visa ran an ad congratulating him.

Morgan Freeman in the Visa ad, tried to come up with an adjective to describe what 8 gold medals mean.

And so he said

Well if one gold medal is great and two is incredible, and three is unbelievable, then well, eight is … we’ll have to come up with a way to describe it.

Maybe Phelps teammate came up with the right phrase:

It’s Phelpsian!