When two individuals engage in joining hands, but as they do so they spread their fingers and one individual rotates their hand to a horizontal plane while the other keeps his or her hand vertical, resulting in a scissoring motion of the fingers. This act is seldom done in error. Its usage could connotate either a later scissoring rendezvous or membership in one of the many global scissoring sororities.
Person 1: "Did you see Mary and Sue do the Persian handshake when Sue came in?"
Person 2: "Yeah, I think they're totally going to scissor later!"