Script Kiddie
A term used for anyone who delights in changing existing scripts (usually some form of malware) in order to build a new piece of malware similar to but not the same as the original. The term, as developed, was meant to be a shameful description of a young person who had nothing better to do than create aggravation around the world but was not smart enough to build a full-blown set of malware from scratch -- they had to piggyback on someone else's work.