Ninja-Signing

When an author secretly signs his/her own books in a bookstore without the bookstore's knowledge.

Brandon Sanderson is ninja-signing books in airports.

by jackatthekilns November 10, 2009

ninjas on the roof

impending doom

as soon as i walked in on Stacy and Jill and that 6 foot toedo, i knew there were ninjas on the roof! Phil would be pissed.

by freewilly23 January 18, 2009

Flute Ninja

A really awesome flute player.

Wow! You are such a flute ninja!

by kitty1432 February 13, 2013

Ninja Eyes

The act in which one uses the "Ninja Eye" to stealthy check out a female.

Only the masters know how to use the Ninja Eyes.

by blackbeltinninjaeyeism October 14, 2009

Ninja Gifting

The Art of gifting an item to a friend or relative, by sneaking into their house and placing said item unwrapped among their personal belongings, in such a way they have no clue who gifted the item to them or where it came from. also can be referred to as Ghost Gifting.

I found a Venus statue in my room, I believe someone has been ninja gifting me while i was at work.

by Monroe space kraken-slayer January 30, 2012

ninja mouse

A term to describe a person who has the ability to sneak out of tight situations requiring the utmost delicacy without a squeak.

Man! That chick slid out of my bed like a ninja mouse.

by BigPansy April 19, 2016

Ninja Face

The art of using face unlock on another person's smartphone without their knowledge. Usually performed by a child from some sneaky angle while distracting the parent with other matters.

She keeps using Ninja Face on me to watch that stupid YouTube channel

by PatTheChat June 8, 2019