It's because he isn't unique. There's always amumu here and amumu there, here a mu, there a mu, everywhere amumu.
Interactive Joke of the Day Mug
Coffee Mug
Mu
Surprise subtext.
His catch-phrase. Short n' Sweet, hope you like it!
Eric Clapton would never let a bag of cocaine fall out of a window...
It slipped a disk.
Golden Dawn
Play-Doh
Shanghai
Get off Mu-lan!!!"
Amumu
It's in tents!
Meow-schwitz.