affectation

noun3

1. •
   An attempt to assume or exhibit what is not natural or real; false display; artificial show.

   • This poem is strongly tinctured with those pedantic affectations concerning the passion of love ... — 1810
2. •
   An unusual mannerism.
3. •
   (rare) An ostentatious fondness for something.

   • Her upper part of decent discipline / Shew’d affecation of an ancient line: / And fathers, councils, church and churches head, / Were on her reverend Phylacteries read. — 1687