Dick Slalom
A vagina belonging to a woman with loose morals that has been used so often and so thoroughly by the opposite sex that penises encounter minimal friction upon entry.
Person 1: "Did you hear Sheryl got pounded out again last night?"
Person 2: "Yeah man, that pussy has gotta be looking pretty close to a dick slalom by now."
Person 2: "Yeah man, that pussy has gotta be looking pretty close to a dick slalom by now."