The Jargon File (version 4.4.7, 29 Dec 2003):

script kiddies
 pl.n.

    1. [very common] The lowest form of cracker; script kiddies do mischief
    with scripts and rootkits written by others, often without understanding
    the exploit they are using. Used of people with limited technical
    expertise using easy-to-operate, pre-configured, and/or automated tools to
    conduct disruptive activities against networked systems. Since most of
    these tools are fairly well-known by the security community, the adverse
    impact of such actions is usually minimal.

    2. People who cannot program, but who create tacky HTML pages by copying
    JavaScript routines from other tacky HTML pages. More generally, a script
    kiddie writes (or more likely cuts and pastes) code without either having
    or desiring to have a mental model of what the code does; someone who
    thinks of code as magical incantations and asks only ?what do I need to
    type to make this happen??