Definitions by Jerry the Hairy Berry

[MSN] Ninja 

One who seldom or never shows him/herself on MSN by appearing offline. MSN Ninja's are very selective of who they choose to be seen by, and just like a ninja, can disappear just as easily as they appear.

"That bitch Fionna is such an MSN Ninja!"

[MSN] Ninja by Jerry the Hairy Berry January 20, 2009