Ninja Meeting was an extreme difficulty stamp in Club Penguin. In order to obtain this stamp, the player had to meet 9 other Ninjas in the Dojo. Players must be wearing the Ninja Mask (any other items, such as the Ninja Outfit, are option) in order to earn this stamp.
This stamp was released on July 26th, 2010, as one of the original stamps.
Before May 23, 2013, the stamp could be obtained by meeting 10 ninjas in the Ninja Hideout. However, when the Ninja Hideout closed, it became the Dojo.