Thin privilege is unfollowing someone literally two minutes after that person made a post critical of society’s thin-centred beauty ideal.
Thin privilege is, in general, unfollowing people for making size equality related posts.
It’s happened to me a few times now. Not that I think those followers are much to mourn over but it does annoy me due to the message they’re sending me and well, I guess whoever else knows that they unfollowed and why. And I do realise people are free to follow and unfollow whoever and whenever they want, but the pattern is pretty obvious here.