fisting: a vernacular term for the sexuoerotic practice of inserting the hand and forearm into the rectum or vagina, also known, respectively, as brachiorectal and brachiovaginal insertion. Also known as
brachioproctic eroticism (BPE) and
brachiovaginal eroticism (BVE);
fist-fucking in the vernacular.
Dictionary of Sexology Project: Main Index