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

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