A word I have seen too often to not remember the definition to it. A pastiche is a work of literature,art, or music that is almost entirely composed of motifs taken from other sources, a Frankenstein of creativity if you will. There doesn’t seem to be anything inherently negative about the word, although I do not think you would use it to signify a creative mix of ideas. It does seem to be used for parodies or homages, as well as just intellectual influence and plagiarism. What I didn’t know before researching this is that it can also be used as a verb.