INF ninja

(noun) 1. a player of the online FPS Infiltration who displays a marked ability to kill an opponent with great speed at close ranges. often while armed with a knife. 2. a player that fires on opposition forces to great effect, while moving or concealed in deep shadows. 3. a player who kills most or all of the enemy team without being shot or disabled. Often a veteran that is picking up slack for a noob and deserves praise. 4. a skilled INF player who commands respect, despite using overt tactics. 5. used derogatorily towards players that uses cheap or cheesy ambush tactics that do not reveal their location. Also a player that does not give quarter, especially in the first few seconds of combat, when quarter may be due. 6. any person or object stealthy, skilled, armed with a gun, treacherous or otherwise similar to an INF ninja.