To have sex, usually very quietly and in a fashion that will avoid detection. From the phrase "Ninja that bitch."
Most often heard in the gerund form "ninjing".
Most often heard in the gerund form "ninjing".
Yo, no ninjing on the mountain!
by Fern, Defender of Trees July 16, 2009
Get the Ninjmug. ninj (v.): to act in such a manner that could be construed as causing trickery, disruption, and/or pain on those who instill one's wrath
Ninj (n.): any one of a number of people who enjoy, and in fact take delight in, causing mischief and trickery on those who deserve it; i.e., mauling someone
Ninj (n.): any one of a number of people who enjoy, and in fact take delight in, causing mischief and trickery on those who deserve it; i.e., mauling someone
v. "I'm gonna ninj you, you bloody prick, if you ever say something like that again!"
n. "I am so a ninj!"
n. "I am so a ninj!"
by ninjgirl May 02, 2011
Get the Ninjmug. by Trav is gay May 05, 2007
Get the Ninjmug. by Rachel Applefield January 24, 2018
Get the Ninjmug. 
Displaying the abilities or likeness of the ninja.
Last night, no one knew we were present, which was in large part due to the fact that we were ninjing in the shadows.
by Nine Lives Co July 18, 2018
Get the Ninjingmug.