A Ninja Slap denotes anything done with incredible style. It is generally performed at a rate which makes it unseeable, but because it is a Ninja Slap, all present understand what has just happened.
"So I said: that's what your dad said." John quipped. The group sighed. Suddenly, Arin's hand moved with incredible quickness and John doubled over holding his crotch.
by ?Ninja May 13, 2005
Get the Ninja Slap mug.
A game involving a group of people (usually over three). Everyone must get in a circle and on the count of three, must take a random pose. After that, going clockwise, one person at a time must try to slap another person's hand (any person). If the person hits another person's hand, the person who was hit must leave the circle. Whether successfully hitting or missing, one must stay in that pose. Only the person who's turn it is and the person who he/she has aimed for may move at a time. The person who is aimed for doesn't go next; the next person is always to the left of the person who just went. The game ends once only one person is left. This game is usually played to pass the time.
Today, in line for the concert, we played ninja slap while the others in line watched in disbelief with a confused look on their faces.
by KzN October 4, 2009
Get the Ninja Slap mug.
A slap made with such speed, with so little noise, that the victim is suddenly in pain without knowing what hit them.
Dude, the other day, I totally ninja slapped the local douche bag at my school. He never knew who hit him.
by JaxD. November 12, 2010
Get the Ninja slap mug.
When a regular bitch-slap just isn't enough, a Ninja bitch-slap incorporates the ancient use of covert agents or mercenarys of feudal Japan specializing in unorthodox arts of war. The functions of the ninja included espionage, sabotage, infiltration, assassination, as well as open combat in certain situations. The underhanded tactics of the ninja were contrasted with the samurai, who were careful not to tarnish their reputable image.

A properly executed Ninja bitch-slap will probably land you a top spot on the bad ass list, right under Chuck Norris.
Scott: I wouldn't mess with Trevor if I were you, man.
I heard he Ninja bitch-slapped one guy so hard he left the country- completely disappeared...

Joey: That guy graduated dumbass,
he works at Taco Bell.

Scott: Oh, did he, Joey?
..Did he?
by thesameoldshit November 30, 2009
Get the Ninja bitch-slap mug.
a small little wiener that is hard and hard to see at night when used properly it can be effective against the female species. Also a sneak fuck from pussy to ass.
Jimmy did a flying spin flip over the table and ninja cock slapped Jenny on the side of the head.
by Matt Kopacz November 1, 2004
Get the ninja cock slap mug.