The act of fully undressing and taking a nude in a classroom, meeting, lecture or other busy event. Almost impossible to accomplish without getting caught.
by UrbanDict is life July 13, 2016

by knafb;lkfbvaklfndbknlF;LKNVDLB July 3, 2015

A highly dependable criminal assistant, as seen in the GTA: San Andreas mission, 'Robbing Uncle Sam.'
CJ: Where we going?
Ryder: Ocean docks.
CJ: How we get this van? It wasn't outside when I came through.
Ryder: My homie LB, he like a clockwork ninja! Real dependable. Unlike some of you motherfuckers...
CJ: Give it a rest man.
Ryder: Ocean docks.
CJ: How we get this van? It wasn't outside when I came through.
Ryder: My homie LB, he like a clockwork ninja! Real dependable. Unlike some of you motherfuckers...
CJ: Give it a rest man.
by Attitewd September 7, 2007

A phrase yelled by your sleeping boyfriend in the middle of the night before he slaps you around the face and lays back down in the bed.
by oogaflugen September 29, 2013

You take a parrot and place it on the womans shoulder, then while stood behind her shout 'Polly want a cracker?!' When she turns around to see what you are doing you bob down and lick her love tunnel without her expecting with such force and vigor she looses her footing twist her ankle and walks like she has a peg leg to the bed with a parrot still on her shoulder.
Friend: Why are you walking like a pirate?
Girl: Oh, that's the result of a nuff buff piece of ass doing a Ninja Pirate on me...
Girl: Oh, that's the result of a nuff buff piece of ass doing a Ninja Pirate on me...
by AWTH August 4, 2017

by ninja dood January 7, 2009

Someone who sits in a public toilet taking a shit as silently as possible, not moving around or making any noise, with the intent of catching someone doing something embarrassing thinking they are not there.
It is usually a good idea to duck down and check for shit ninjas before you do something that would otherwise be considered embarrassing.
It is usually a good idea to duck down and check for shit ninjas before you do something that would otherwise be considered embarrassing.
Joe: *walks into bathroom, thinking nobody is in there*
Joe: FUCK, that slutty little bitch was SO motherfucking hot! But too bad she's only twelve years old! *slams wall with fist*
*sound of rustling toilet paper*
Joe thinks: (Oh god, it's a shit ninja)
Mike: *walks into bathroom, thinking nobody is in there*
Mike: I gotta take a massive fucking dump! *FAAAAAART*
*sound of someone shifting around on a toilet seat cover*
Mike thinks: (fuck, not another shit ninja)
Joe: FUCK, that slutty little bitch was SO motherfucking hot! But too bad she's only twelve years old! *slams wall with fist*
*sound of rustling toilet paper*
Joe thinks: (Oh god, it's a shit ninja)
Mike: *walks into bathroom, thinking nobody is in there*
Mike: I gotta take a massive fucking dump! *FAAAAAART*
*sound of someone shifting around on a toilet seat cover*
Mike thinks: (fuck, not another shit ninja)
by Duo47 March 2, 2009
