The word "af" is an abbreviation for "as f*ck." It is often used to emphasize something to the extreme or to describe that something is at the highest level. It adds intensity or emphasis to the word or phrase that comes before it. Full definition
At the exhibition, compiled by the Moderna Museet of Stockholm, you can experience the creative legacy of Hilma af Klint in all its complexity. (kumu.ekm.ee)
A retrospective of Hilma af Klint at the Guggenheim, New York (12 October 2018 - 27 January 2019), which then travel to the Museum of Contemporary Arts Los Angeles, and its catalogue. (frieze.com)
Yet many viewers may feel a spooky otherworldliness in the works of af Klint and Kunz that is not to be found in Martin's art, a feeling that will be familiar to fans of outsider and visionary art. (nytimes.com)