One who imitates or plagiarizes others' work.
A criminal who imitates the crimes of another; specifically, a criminal who commits the same crime, especially a highly-publicized one, that has just been or recently committed by someone else.
Imitative; unoriginal.
To act as a copycat; to copy in a shameless or derivative way
A person or work that does not exhibit originality.
Not being the first or earliest version of something, not original.
Lacking originality.