Definition of ninja

• Ninja, n. 1. An unusual or odd person who stands out in a crowd for any reason--an object of mockery; 2. A person deserving of praise, as in,"Wow, you're such a ninja for breaking into the Pentagon's secret files." v. 1. To take, steal, grab, or pick up, as in,"Hey, ninja me that remote control, will you?"; 2. To move stealthily or quietly, as in "We'll have to ninja by the guard really carefully."; 3. To leave or go, as in,"Let's ninja over to Brad's house."

  That midget comedian is a real ninja.

  by Nathan F., Ferndale, MI, USA, Nov 04 1998.

• To win a game or event. Scoring high on a video game
  
  "I totally Ninjad that game"

  by Anonymous, Mount Vernon, OH, USA, Jul 26 2009.

• a male.

  by WalterGR, Sacramento, CA, USA, Oct 03 2009.

adjective

• desirable or impressive, particularly due to posession of ninja-like qualities (e.g. stealth, prowess in combat, efficiency)

  Wow--he is totally ninja.

  How very ninja of you, mon cher!

  by Rachel E., Asheville, NC, USA, Oct 17 2003.

• Describing anything stealthy.

  You got his password? That is very ninja.

  by Justin S., Los Angeles, CA, USA, Dec 10 2004.

noun

• a person who is stealthy, or commits a crazy act with unbelievably good results.

  I can't believe you just won the poker game, ninja.

  by Justin S., Los Angeles, CA, USA, Dec 10 2004.

verb

• To do something stealthy.

  I just ninjaed the last donut.

  by Justin S., Los Angeles, CA, USA, Dec 10 2004.