rolling the raisin
The act of using one's finger of choice to manipulate and stimulate the clitoris with the intent of causing great pleasure and pre-orgasmic writhing culminating in primal screams, foaming of the mouth and/or undying professions of love from the recipient of said clitoral stimulation.   
Mara, Lorelei and Julie were so inspired by the swimmers' dents that they promptly returned to their cubicles and spent the afternoon rolling the raisin until they were drenched in pussy froth and their orgasmic screams had raised the ire of their division chief.