What is "zipslack"

ZipSlack was a specially compiled release of the Slackware Linux distribution which was designed to be lightweight and portable. It was distributed in a ZIP archive along with the Slackware release.

Installing ZipSlack only required obtaining the archive and unzipping it to the place where the user wished to install it, which means that ZipSlack did not require one to go through the process of reconfiguring your existing partitions to try or install it.