Term used for the sex act known as either ass to pussy, A2P, ATP or spetic vagina. This invloves the active partner swapping between fucking the ass of a woman to fucking the pussy of a woman multiple times during sex. The cock or object will not usually be washed making for a higher chance of infection.
"That bitch loved it last night when I tried some Double Dipping with her, she has probably got a shitty pussy now but I don't care."