Riding on Top: The Slide

Lisa

So me and my new guy just started having sex and we’re at that fun stage where we’re each trying to figure out what the other likes. He told me that he prefers girl on top and likes when girls do what he describes as “the slide” move. I have no idea what that is. He described it a bit and made it sound like instead of letting my hips rise and fall I’m just sort of grinding them? Any ideas?