When you experience immense feelings given by cute and heartwarming content. This causes a person to feel warm inside and say 'awwwww'.
Person 1: Omg, I'm experiencing a Fluff Overload. That video of Dan and Phil was so domestic, I can't-
Person 2: Get a hold of yourself child.
The feeling when you become bored/used to Fandom content. When someone indulges themself in large amounts of Fandom content, they become tired of it. It has a similar feeling to being Partied Out.
Person 1: Man I just finished reading 2 slow burn fanfics. I'm kinda tired of it now
Person 2: You're probably Fandomed Out. Try doing something else for a bit to recharge.