We used it plenty to diss the kids pingflooding their school then saying they hacked it, or using winnuke or Back Orifice (manually, by installing the client themselves) on a friend.
If you used a downloaded tool without any interest in how or why it worked, you were a script kiddy. There wasn’t really a definition or anything, you just knew.. the person was leet, or they were a skid.
Searching for the term probably won’t help much though as we bastardised as much text as possible back then. 5cr1p7 k1ddy, sk1d, skiddy, scriptkid, skript kiddy.. it was essentially a sport to make your text as illegible as possible while still being able to understand each other. A form of slang I guess.