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1.
The word to say when some thing awsome happends.
Did You see the amazing TD last night? Yea it was ninjarific
av The awsome offspring 28 september 2009
 
2.
adj.
1. Synonymous with terrific, but carrying extra weight due to the addition of the word ninja because ninja are supremely terrific already.

2. Terrific in a ninja kind of way.

3. Ninja + Terrific = Ninjarific
1. These cookies are ninjarific yo!
2. Your cosplay outfit is ninjarific!
3. That anime is super ninjarific!*

*Note: in this instance it can mean that the anime involved ninjas and was therefore terrific in it's ninjafulness.
av Melissa the random samurai 13 augusti 2006