Plagiarism: The abuse of another’s original work by copying it and passing it off as one’s own.
As defined in Alastair Campbell book titled The Designer’s Lexicon. Page: 293 ISBN:0-304-35505-4
A copycat is a person that mimics or repeats the behavior of another. The term is often derogatory, suggesting a lack of originality. The expression may derive from kittens that learned by imitating the behaviors of their mothers. – Wikipedia