The story
From fan + sign. Initially gained popularity in the sense of a photograph of a person with an inscription in 2012. Gained popularity in the sense of a meet-and-greet with a K-pop artist in 2016.
Etymology from Wiktionary, CC BY-SA 4.0.
fansign
Today it means: A photograph of a person with an inscription (often on the body or a piece of paper) used on the Internet as an autograph of a celebrity or as a sign of love for a celebrity from a fan. Full definition →