A ninja who has a twin, who also happens to be a ninja. It is a portmanteau of "twin ninjas".

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.

Kawasaki's line of twin-cylinder Ninja motorcycles (the EX- line), including the Ninja 250, 500 and 650; this is distinct from their four-cylinder supersport cousins (the ZX- bikes).

2 ninjas