What's on your mug?

Someone is a ninja if their dick is licenced as a lethal weapon.

Bob: "Dude! That guy just killed 9 people with his dick!" Jim: "Yup, hes a ninja."

By The samm

To receive the assassination medal in Halo 3 by striking an opponent in the back. Occasionally done by jumping over said opponent while they are in hot pursuit and smacking the back of their head (This is usually performed by more skillful player due to the need for precise timing and control).

Halo Player 1: Why are we in theatre mode? Halo Player 2: I just have to show you this awesome Ninja I pulled on (Insert Pro Gamertag) last night in MLG. Halo Player 1: Is it anything like the other 6 you have in your Fileshare already? Halo Player 2: Better..

By AZB

incredible game in which players bow toward one another to start the game and then each player makes one move at a time, in a clock wise manner. the object of the game is to hit the opponent(s) hand. the last person standing is declared the ULTIMATE ninjaaaaaaaa... these games lead to awkward positions by all players, most of the time very homosexual. often a lunch time pass time for jasons, manuels, sebastians, and franciscos.

Person 1: dude, what do you want to do? Person 2: lets play Ninja! Person 1: hell yeah!

By the_ninjirate

n. an awesomely cool assassin. They are japanese...not chinese. Do NOT get them confused. vb. to kill, maim, or torture someone. It is ALWAYS fatal.

(n) Did you see that ninja catch that throwing-star with his teeth? (vb) Don't make me come ninja you!

By Takashi Karaki

This is the replacement word for white people to call someone a nigger and it be ok.

Wow, that oreo is being such a ninja right now.

By Collierflower