We were out all day with Jane and never noticed she wasn't wearing a bra. It was nipply out and she wasn't wearing a jacket either. The woman's got ninja nipples!
by ShrewdSimian May 31, 2010
by Nothunterself December 17, 2013
A member of a not-so-secret and vaguely homoerotic society originating in Danville, California. A Nipple Ninja is fluent in many techniques of nipple flipping, and performs his art on unsuspecting victims. These moves (examples include: The horseshoe, the rainbow, the monkey wrench, and the Horny Hungarian) can be performed in friendly or unfriendly situations.
by Steve Kaye December 3, 2005
What a baby is called when displaying innate ability to fend off removal from the breast when feeding.
by Annie's Mum May 12, 2009
When you're about to cum, twist the girl's nipples as hard as you can so she freaks out and screams and is distracted, oblivious to the fact that you're blowing inside her
The day before my two weeks notice was up was the same day my asshole boss gets back from Sweden; therefore, I pulled the stealthy nipple-ninja on his wife. That'll learn em'
by Brandon/Steve April 9, 2013