The noble art (or science) of self-defence boxing.
noble gas any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
the noble savage a representative of primitive mankind as idealized in Romantic literature, symbolizing the innate goodness of humanity when free from the corrupting influence of civilization. The phrase itself comes from Dryden's Conquest of Granada (1672).
See also four noble truths.