Facesibling
A person you pretend is your sibling on Facebook. No real bond. Just a title you gave them so you look cooler. It doesn’t mean anything.
My facesibling is my gym buddy. He’s got 100 likes. I got 1.
I called my barista a facesibling. She said I was a weirdo.
My facesister is my cat. She doesn’t care. She just sleeps.