A sexual act where the male dips his penis first into the vagina, and then tactfully slides it into her anus so as to casually
transition from vaginal to anal sex. It
generally causes great discomfort and so the
transition is often short-lived, unless the girl happens to like it.
Bro 1: "Yo I gave Emily the Dip N' Slide, she reacted
violently."
Bro 2: "Thats awesome, I tried it and Hillary loved the Dip N' Slide! But I'm not
surprised her
butthole could take it."