(n) :
a person trained primarily in,
stealth,
espionage,
assassination and the Japanese martial art of
ninjutsu; a Mongolian amateuristic private
miner (mainly for gold); after the shape of the plastic
bowls used to wash metal
ore with
mercury, roughly resembling one of the Teenage Mutant Ninja Turtles
"2007 October 10, Jonathan Watts, "Prospectors and 'ninja' miners flood to east's El Dorado" , The Guardian,"