Like a circle jerk but for women. A bunch of girls get in a circle and compete to see who cums first. First appearance is in the story Silent Striker by Ghosthatesjames.
"I've been tellin' you man! Circle jerks the best!" The I-JamaicanGuyInABox said.
"No that is square fingering!" Blake said.
"The hell is that?" Her girlfriend asked.
"Circle jerks for women!"