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(noun) The act of female/female sexual congress where the two sets of vulvae are rubbed together stimulating the sensitive perineum, pair of labia minora, and clitoris. ~ can be performed face-to-face with an explicit emphasis on clitoral stimulation, or ~ can be performed where one female has rotated her pelvis so that the legs of the two slot into one another as in scissoring.
The two lustful women writhed in the throes of tribianism as their eager partners watched with mounting temptation.
by Lampoo July 10, 2008
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