afflouncement

Noun

 * 1)  Posting of a flounce, or melodramatic announcement of one's departure from a group or forum.
 * 2) * 2023 NextDoor.com, Lansing, Michigan area, a user's reply to another's post, 27 Oct 2023
 * "Not an airport, no need to announce your departure. Nice to see afflouncements on here too. NextDoor is now officially a social media app"
 * 1) * 2019 Louise Tilbrook Designs, accessed 4 Nov 2023 (same content began on another platform, Ravelry.com, apparently in 2019)
 * "Afflouncement shawl" (Artist's conception with description explaining design and context)

Usage notes
This is relatively new, and spelling varies, specifically with regard to the single or doubled "f."