Ninja Fingers 

Kids, ever have parents walk in on you when you're supposed to be doing homework, instead you're playing a full-screen game? Adults, ever had a roommate/spouse/friend walk in on you as your viewing a hot A2M porno? Well then, you gotta employ some ninja fingers!

Mom: Timmy, are you doing your essay?
Timmy: *Alt+Tab* Yes mom, i am!

Rick(walking into Dick's room): Hey, did u catch the game last night!?
Dick: *Alt+F4* Yeah dude, that was awesome!

They both used ninja fingers to protect themselves.

Ninja Fingers by AspenW October 4, 2006

ninja fingers 

A name given to individuals who go above and beyond the average skill for fingers. This name is commonly used to describe a lesbian's skill at fingering their partner.

Person 1- "So gurlie...I heard that you and your girlfriend had an interesting night! How did it go?"
Person 2- "Wow, let me tell you, that girl has got some hardcore NINJA FINGERS."

ninja fingers by Shiggity-wah January 18, 2008

Ninja Finger 

The finger one uses to slice fruit in the popular iPhone game, Fruit Ninja by Halfbrick Studios.

pdawgg: dude have u seen n3mesis's Ninja Finger? its like he's giving u the finger while he's playing!

gauravmehta: yeah dude he's got mad technique..

n3mesis: *takes a bow*

Ninja Finger by [n3mesis] May 18, 2011

Two Finger Ninja Technique 

Where someone can undo someone's bra with a finger and a thumb. It is easy to do, but not to understand... It involves squeesing either part of the strap and releasing.

Betty: God, I hope Jonny doesn't do that ninja shit thing today...
Jonny: TWO FINGER NINJA TECHNIQUE!!!
Betty: For fuck's sake

Two Finger Ninja Technique by Ill Hubs November 8, 2009