Definition: Script Kiddie
From Wiktionary
1. (derogatory) A (usually amateur) hacker who compromises files on others' computers or launches attacks on computer systems, using widely distributed
computer programs or scripts, rather than using their own unique programs or scripts.
From Urban Dictionary
n. (Hacker Lingo) One who relies on premade exploit programs and files ("scripts") to conduct his hacking, and refuses to bother to learn how they work. The script kiddie flies in the face of all that the hacker subculture stands for - the pursuit of knowledge, respect for skills, and motivation to self-teach are just three of the hacker ideals that the script kiddie ignores. While anyone can be a script kiddie, generally they are teenagers who want the power of the hacker without the discipline or training involved. Obviously anyone who follows this route aspires to be a blackhat, but most refuse to even dignify them with this term; "blackhat" generally implies having skills of your own.
Other common terms for the ubiquitous script kiddie are lamer, llama, jackass, pre-pubescent ten-year-old, and of course the most unique, asshat.
From Webopedia
A person, normally someone who is not technologically sophisticated, who randomly seeks out a specific weakness over the Internet in order to gain root access to a system without really understanding what it is s/he is exploiting because the weakness was discovered by someone else. A script kiddie is not looking to target specific information or a specific company but rather uses knowledge of a vulnerability to scan the entire Internet for a victim that possesses that vulnerability.