Chat Ninja 

That person you wish you didn't know who seems to lurk on facebook or aim waiting for you to log on so they can message you within 2 seconds. You usually know this person from elementary school or they tried to get you in on a pyramid scheme.

6:42 pm <I'mTotallyNotDave> is online
6:42 pm<FamilyGuy24/7> Hey man!! are you sure you don't want to make a ton of money quick selling knives?

6:43 pm<I'mTotallyNotDave> .... effin chat ninja.

6:43 pm<I'mTotallyNotDave> is offline.

Chat Ninja by I'mTotallyNotDave November 9, 2010

Chat Ninja 

Someone who lies, usually about their age, in order to enter a chat room.

It's only a matter of time before I go to jail for accidentally cybering with an eleven year old chat ninja.

Chat Ninja by Randwulf February 4, 2010