Noun: A television show which originally aired on Japanese television, known as Sasuke there, in between dramas. It features contestants trying to complete the four difficult stages on Mount Fujiyama. It now appears on G4 and many American viewers are transfixed by the ridiculousness of the course, but also at the contestants atheleticism.
Verb: To attack a series of obstacles with a lack of fear, determination, and strength.
N: Did you see commercial fisherman Makoto Nagano race up the final obstacle on Ninja Warrior. That motherfucker is crazy, i saw him practicing on his bigass fishing boat. I bet he smells like cod.
V: Oh shit, this is nice. Watch me ninja warrior over this fence, across that pole, up the stairs, swim through that pond, and hit the oak tree at the end of the street. It's goin to be fucking nuts. I bet I can do it in like 25 seconds.