a mystical being able to transcend in and out of buildings, rooms, houses, social groups and even multiple dimensions, Usually under the influence of alcohol to the point of memory loss
by Dancingdanshittingsand October 29, 2012

Video game opponent who appears to teleport all over the map due to lag.
Sometimes using a lag switch.
Sometimes using a lag switch.
by Yhatzee January 31, 2009

The act of directing ass-air towards your adversary’s nose while simultaneously emulating your favorite Bruce Lee move.
Ripping one in a meeting room, performing the ass Judo and exclaiming "Awwwwww! Ninja Fog!" then bowing in respect.
by ZoinksS2k January 27, 2009

After a sporting event; when your teammate is washing his hair and his eyes are closed, someone sneaks up behind him and checks his oil with their thumb (quickly slips a thumb in his ass), then runs off before he is able to rinse the soap away and identify the clandestine violator
After the game someone gave John a rusty ninja. John was attacked by a rusty ninja after the game. Be careful, there's a rusty ninja in there.
by sandy_x December 4, 2012

Somebody who always seems to know where everybody is at all times, even when huge amounts of effort have been taken to ditch them.
Originates from the way in which they travel mostly through the rafters, so as to stay out of everyone's awareness like a ninja
Originates from the way in which they travel mostly through the rafters, so as to stay out of everyone's awareness like a ninja
Person 1) Wow... I can't believe it, we managed to ditch Barfield. Now to spend some quality time with the amigos without jokes being undermined etc.
Barfield) *sprints along rafters like a Shinobi, darting from the shadows with unprecedented stealth* Hey guys, what are you all doing in town? You told me you all had the plague... You weren't tryin to ditch me, were you?
Person 2) Jesus, you're such a fuckin' rafters ninja
Barfield) *sprints along rafters like a Shinobi, darting from the shadows with unprecedented stealth* Hey guys, what are you all doing in town? You told me you all had the plague... You weren't tryin to ditch me, were you?
Person 2) Jesus, you're such a fuckin' rafters ninja
by Andy Hutchings January 13, 2008

the art of sporting socks with thong flip flops, which in fact look like the traditional footwear worn by Ninjas
at first glance he looked like a geek with his socks and flip flops on, but wait...don't ninjas wear stuff like that, he could know karate... he does have Ninja Toes!!
by nevets eural September 5, 2010
