When a man puts his testicles on a females forehead and quickly does a reverse pelvic thrust so that the testicles slide down her face similar to rocks sliding down a hill.
by iInventedTheRockSlide December 03, 2007
When you are in a girl and you pass a kidney stone through your penis into her vagina or anus cavity. Thus a rock slide.
The Dr. told me I had a kidney stone so I made sure to give Erica a rock slide when ramming her last night. I wonder when she'll pass it.
by jeremy2027 November 27, 2007