10 definition by Exterminator (not really)

A type of droid in Star Wars designed to kill important people. Despite being among the most badass droids featured in the franchise, they weren't done justice until the release of The Mandalorian.

Dr. Otto Octavius. A nuclear scientist and skilled inventor, he created a set of four robotic tentacles that were controlled with a neural interface. After a lab accident welded them to his body, he suffered brain damage and became a mad megalomaniac- and arguably the biggest headache for Spider-Man.

A covert agent or mercenary in feudal Japan who is unlikely to be seen by anyone who isn't also a ninja.

Following a code of darkness and deception, ninja had some of the most advanced and complex martial arts training in history and had expertise in unorthodox military tactics that baffled pretty much anyone at the time.

Ninjas gradually disappeared from historical records during the Edo period. Theories abound regarding what exactly happened to them, but the lack of information about the matter leaves us unsure of the truth. This is not a coincidence, as the ninja code encourages ninjas to remain anonymous and mysterious.

So where are they now? The answer is actually the same one you'd get from your average person in feudal Japan- that being "We have no clue whatsoever."