202 sites have this keyword listed in their metadata, here's one you may hate:
 
  
    
    
    
      
      A rather festive ninja duel atop the forest canopy.
Clip from Ninja Daisenso.. who knows when I'll get that done.
     
    
       
  Other sites with this keyword...
  
  
    
      
        | site | user | views | score | 
          | ?Panic at the Disco = Ninjas | Assmaster | 4,658 | (3.21) | 
                
          | ?Ninjas in the USSR... | Baikasu | 2,302 | (3.21) | 
                
          | ?What's Better Than Pirates OR Ninjas? | elprogramer | 3,918 | (3.20) | 
                
          | ?ZOMG ninja attack | uruloki | 2,621 | (3.20) | 
                
          | ?The single most badass thing you'll ever see. | IronLung | 1,268 | (3.20) | 
                
          | ?The Rave Drome | Merkilo | 5,787 | (3.20) | 
                
          | ?Guess who's a pirate | Arcania | 2,273 | (3.20) | 
                
          | ?google language tools phails at life | loserkage | 2,762 | (3.20) | 
                
          | ?The original is always best | Sepherotic | 1,005 | (3.20) | 
                
          | ?THE PRESIDENT HAS BEEN KIDNAPPED BY ... | iruleatgearsofwarlol | 1,723 | (3.18) | 
                
          | ?and you wonder why people like loli | myfreepaysite | 6,774 | (3.17) | 
                
          | ?What is Majik ninjas? | MrPhatCat | 1,540 | (3.17) | 
                
          | ?(nsfw) kwantsu, dudes! | kidchemical | 1,857 | (3.14) | 
                
          | ?Hellacious Ninjas | w3s | 1,281 | (3.13) | 
                
          | ?Super Ninjitsu Shadow Dance | SSJHibiki | 2,265 | (3.13) | 
                
          | ?Fatty feels left out - ninja battle | Novalux | 28,628 | (3.10) | 
                
          | ?Are you a bad enough Skuld to rescue them? | sabremau | 2,839 | (3.09) | 
                
          | ?China beats Japan because... | novaman3 | 2,266 | (3.09) | 
                
          | ?The President Has Been Kidnapped By Ninjas | Wraith1 | 2,357 | (3.00) | 
                
          | ?Ninjas Never Win | Brean | 1,468 | (3.00) | 
                
          | ?I Am Ten Ninjas | DschinghisKhan | 2,081 | (3.00) | 
                
          | ?CanadianNinjas | russmartin | 1,099 | (3.00) | 
                
          | ?hah | lawlawlnooblawl | 1,151 | (3.00) | 
                
          | ?medieval yoshida bros. | bustergirlfriend | 1,729 | (3.00) | 
                
          | ?YOU'LL PAY NINJAS!!!!!!! | Metalslug | 1,927 | (3.00) | 
                
          | ?I AM TEN NINJAS! | Orochi-Gama | 545 | (3.00) | 
                
          | ?Tiny Plaid Ninjas! | PippinTheJedi | 3,326 | (3.00) | 
                
          | ?Those Cons are goin' love you (fixed) | zargos | 1,765 | (3.00) | 
                
          | ?Ninja Turtles Dance | fruhtloops514 | 6,425 | (2.91) |