basically doing everything a ninja (killing sneaking around taking out pirates the usual) does without being seen or heard
d00d I was having so much fun ninjaing yesterday I took out three guards with no problems
The Act Of Shop Lifting Or Doing Something Very Ninja Like.
Guy1 "hey what you up to?"
Guy2 "not much just going ninjaing"
Guy1 "oh ok cool could u get me a mars bar?"