plagiarist

One who plagiarizes; one who is guilty of plagiarism.

One who plagiarizes, or purloins the words, writings, or ideas of another, and passes them off as his own; a literary thief; a plagiary.

One who plagiarizes; or purloins the words, writings, or ideas of another, and passes them off as his or her own; a literary thief; a plagiary.

someone who uses another person’s words or ideas as if they were his own