The word "skid" has many different definitions, but more commonly used online to refer to kids that are wannabe hackers, who have low-level knowledge of hacking and / or computers. They often plagiarize other people's work and call it their own, to look like "pro hackers", when they are really just noobs trying to look cool online.
Look at Tom, he's such a skid, he stole John's security softwarecode and used it in his own program.
Little pieces of shit that are hated by the roblox exploiting community. They will either leak a private script or will leak a unpopular script that is public, that the creator doesn't want you too leak. They will post on either V3RMILLION or Pastebin. They will go far as too act like they made the script, even though they have no concept of scripting/coding, and they probably cry in their bathroom all daylong because they lonely.
Dang this skid really leaked this private script. That really sucks for the creators of it...