Ruthian is used mostly in the world of sports and is used to describe a super performance or single accomplishment.

It's been around for many years and it's origin is derived from the greatest baseball player ever. The one and only Babe Ruth.
Lebron James put up a "Ruthian" performance in his last playoff game, scoring or assisting in the last 37 points scored by the Cleveland Caviliers.
by SHOELESSJOE3 May 29, 2009
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