a practitioner of the ancient art of ninjitsu, who happens to enjoy smoking the occasional wiener.
The guy that lives accross the hall from me is an ass ninja
by Dusitn for Pres in 96 April 24, 2005
Get the Ass Ninja mug.
a sensitive asian guy, an asian guy who likes birds
Leon is a real bird ass ninja, he gets upset when he is not svelte.

Leon likes birds, so he must be a bird ass ninja.
by DrJK December 21, 2010
Get the bird ass ninja mug.
a rather crazy assed ninja, such as yoda, or chuck norris (also note chuck norris kills most failed crazy assed ninjas)
by Crazy assed ninja January 29, 2009
Get the Crazy ass ninja mug.
International day to post a person you think fits the definition. Unlike national best friend day this is for the people to post anyone they think deserves the title
When is National Bitch Ass Ninja Day ? Cuz I got a few people I want to post
by AYYYESAP October 4, 2023
Get the National Bitch Ass Ninja Day mug.