What is Rock Slide?
1.
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.
"Hey man i gave that chick i took home a rock slide last night."
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2.
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.
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