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A slang term, made famous by the rap group the Insane Clown Posse, meaning Homie, or freind
Juggalo 1: What up, Ninja?
Juggalo 2: Not Much,Homie, Got some Faygo?
dari Matt Stegall Selasa, 19 Juni 2007
Abbreviation for No Income, No Job Assests.
"damn i screwed myself over when i married that ninja!"
dari GTFO . Minggu, 21 Desember 2008
A member of a class of 14th-century Japanese mercenary agents who were trained in the martial arts and hired for covert operations such as assassination and sabotage.

Acronym: Need Information Now Just Ask. A person who is an expert at something, or carries a great deal of knowledge about a particular thing.
The ninjas move swiftly through the palace.

Ask Daryl, he's the ninja to look for.
dari Drewsef Kamis, 16 Juni 2005
plural for ninja.
dari AYB Rabu, 02 April 2003
A special person dressed in a black outfit with only their eyes showing. They are very good with literature and are best known for their role in the religious society as priests
my friend is a ninja" "fo' realz? can they help me with my english paper?
dari Mdiggy the deaf girl Jum'at, 17 Desember 2010
A racial slur directed towards a person of African-American decent. Used in place of nigger.
That ninja is being loud.
dari ninjabirds Selasa, 21 September 2010
A substitute word for the N-word.
Yo, What up my Ninja?
dari John Smuggy Senin, 11 Januari 2010