From
Urban Dictionary :
The act of inserting 2 fingers into the vaginal opening (normally the index and middle fingers), and 1 into the anus (normally the "pinky" finger). This is usually performed when she is laying back, in the "deep thrust" postion (see "deep thrust" for more hardcore info). Commonly described a numerous number of ways, e. g. 2 in the pink, 1 in the stink; two in the grass one in the ass; two in the slut one in the butt; two in the koot, one in the boot; goin to town with one in the brown; and many more, this method of sexual gratification is one sought out by people of all levels. But only grand masters, like the Big Johnson have perfected it.
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Hmmm you learn something new every day.... Had no idea.... Guess it's an age thing...