Definition: Script Kiddie
From TechTarget
Script kiddy (sometimes spelled kiddie) is a derogative term, originated by the more sophisticated crackers of computer security systems, for the more immature, but unfortunately often just as dangerous exploiter of security lapses on the Internet. The typical script kiddy uses existing and frequently well-known and easy-to-find techniques and programs or scripts to search for and exploit weaknesses in other computers on the Internet - often randomly and with little regard or perhaps even understanding of the potentially harmful consequences. Hackers view script kiddies with alarm and contempt since they do nothing to advance the "art" of hacking but sometimes unleashing the wrath of authority on the entire hacker community.
While a hacker will take pride in the quality of an attack - leaving no trace of an intrusion, for example - a script kiddy may aim at quantity, seeing the number of attacks that can be mounted as a way to obtain attention and notoriety. Script kiddies are sometimes portrayed in media as bored, lonely teenagers seeking recognition from their peers.
From All Words
(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.