What is scissoring?

Scissoring is a popular abusage of the word scissor. To scissor is to cut with a shearing action (or cut with scissors) Scissor is used to describe a scissor like action, usually performed with the legs, in athletic or gymnastic events as in scissor kick or scissor hold. It is also used to describe sexual congress between lesbians where both partners rub their genitals together. See: D-Yikes! episode 1106 (#159) of South Park