mēm/noun
-An element of a culture or system of behavior that may be considered to be passed from one individual to another by nongenetic means, especially imitation.
-A humorous image, video, piece of text, etc., that is copied (often with slight variations) and spread rapidly by Internet users.
pla·gia·rism/noun
-The practice of taking someone else's work or ideas and passing them off as one's own.
synonyms: copying, infringement of copyright, piracy, theft, stealing; informal cribbing.
"accusations of plagiarism"