The phrase "second slide" typically refers to a presentation or a series of slides. It means the second page or image shown after the initial page or image. Full definition
Second a slide move has been thrown into mix, but it's pretty much useless, although I have no doubt some inventive players will probably find something cool to do with it. (wolfsgamingblog.com)
The redesigned system should have a built in second slide pad, L2 & R2 triggers, a widescreen touchscreen, a better battery life, and higher megapixel cameras. (nintendojo.com)
He was first to everything and made a last second sliding tackle on Milinković - Savić to ensure the score remained at 0 - 0. (italianfootballdaily.com)