ninja
noun
°A person trained primarily in stealth, espionage, assassination and the Japanese martial art of ninjutsu.
°A Mongolian amateurish 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.
verb
°To act in the manner of a ninja, especially in the areas of speed and power.
°To claim an item in a game by abusing game mechanics, often despite having no real need for the item or ability to use it.

dictionary
noun
°A reference work with a list of words from one or more languages, normally ordered alphabetically and explaining each word's meaning and sometimes containing information on its etymology, usage, translations and other data.
°(computing) An associative array, a data structure where each value is referenced by a particular key, analogous to words and definitions in a physical dictionary.

rocks
noun
°(slang) Money.
°(vulgar) (slang) Testicles.
verb
°Third-person singular simple present of to rock.