pastiche

Short definition from Wiktionary

Noun

1. 1
   A work of art, drama, literature, music, or architecture that imitates the work of a previous artist, usually in a positive or neutral way.
2. 2
   A musical medley, typically quoting other works.
3. 3
   An incongruous mixture; a hodgepodge.
4. 4
   A postmodern playwriting technique that fuses a variety of styles, genres, and story lines to create a new form.

Verb

1. 1
   To create or compose in a mixture of styles.