Top Definition
The replacement holiday for Christmas built on the belief that Santa is actually a Ninja due to his ability to get in and out of houses undetected. This holiday is typically followed 7 days later by New Chuck's Eve.
Merry Ninjamas
di EvilSpyBoy 09 maggio 2010
Only the best holiday ever. On December 3rd you have the chance to dress and act like the beloved ninja.
Dude1- I can't wait for ninja-mas!

Dude2- I alredy have my ninja stars polished!
di Samankerrkid 24 novembre 2009
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