The definition as it has been explained through out the years is NOT to plessure a woman with one finger in her pussy and one finger in her ass. On the contrary it is TWO fingers in the pussy and One in the ass. It is most commonly explained to the unknowing with the following anechdote "Two in the pink, one in the stink"
by Raoul Duke March 21, 2005
by Cronic king April 23, 2003