Insane rallying chant.  Anyone who says cheering isn’t athletic needs to hang out in the outfield during a long version of this one.  It doesn’t end until the inning is over.

It’s really in English, too!
Lyrics (such as they are)
La-LaLaLaLaLaLaLaLa-
La-LaLaLaLaLaLaLaLa-
La-LaLaLaLaLaLaLaLa-
La-LaLaLaLaLaLaLaLa-
La-LaLaLaLaLaLaLaLa-
La-LaLaLaLaLaLaLaLa-
La-LaLaLaLaLaLaLaLa-
La-LaLaLaLaLaLaLaLa-
Ma! Ri! Un! Su!  Ma! Ri! Un! Su!
Let’s go, {player at bat’s name}

Video

Not my own, though I have one somewhere.