Chinese meaning of TO TWIST AROUND backwards, to BEND BACK, something a canid such as a dog does often, such as when it RETURNS to inspecting or sniffing its own anus, or licking its genitals, or when another dog approaches and begins anal sniffing (that sort of thing), which if done by a human being to another animal (human, bitch, ewe, sow, and so on) leads TO VIOLATE, to be RUTHLESS with no pity, no repentance, no remorse, no compassion and behave as does a TYRANT (a cruel king or lord, 鐵)…noting that「return」literally means 'to turn again, to go back to where it started.'
Elements are also「howling with repeated erection」and「canid with anal doorway」as TO HOWL AT THE MOON, with this glyph perhaps as the source of that English phrase brought back from China. Significantly, canids such as wolves DO NOT actually howl at the Earth's natural satellite known as the Moon, an utterly false and disproved notion…but the human wolf howl and wolf whistle at a buttocks of some sort, now that's a horse of a different color (say…skewbald overo, blood-bay or seal brown instead of cremello or perlino. See 駁, 騮).
「Dog」inside「buttocks crack」should need no further explanation as SHOWING NO PITY, MERCILESS, a violent human dog at a buttocks crack, taking what he wants and having his way with a rectum.
Nevertheless, when a pack of canids (wild dogs, wolves, jackals, foxes, dholes, dingoes) begin devouring a carcass, they begin fundamentally by tearing open the place easiest to access with softest tissue and where a hole naturally occurs: the anus. Then usually gorging as much as possible only to RETURN HOME to their den and DISGORGE, VOMIT chunks of meat for their pups to ingest. Canids are extremely intelligent and clever pack hunters, stalking prey while SHOWING NO PITY, MERCILESSLY attacking. Deaths by wolves are notoriously difficult to investigate by human authorities when a person has been reported missing because no body parts can be found, no bones, no pieces remain, not even small ones…just a spot of reddish snow or mud, perhaps. RETURN and RESUME feeding until all has been devoured.
A human being with「emphasis on two hands in buttocks crack」may well be inspecting or sniffing his or her own anus, TWISTING down to get a better look and smell while suffering from an infection or an infestation that continues to RETURN and RESUME its due course WITHOUT MERCY.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: to bend; to violate; to go against; ruthless and tyrannical
Japanese EDRDG: perverse, recalcitrant, rebellious
Unihan extended: perverse, recalcitrant, rebellious