Fangirlioma is a rare disease that usually targets fan girls. Don't worry, it's only Sans Undertail fan girls that make cringe content on YouTube. Animations using Flip-A-Clip have a higher risk of Fangirlioma.
Infected Person: SANS IS MINE!
Duck: Wow... she might have fangirlioma...
"Dude I married Selena Gomez during quarantine"
"I broke up with Charlie Puth and I started dating Tom Hiddleston"
"Damn a life we have! Full of fangirlism!"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"