Facedouche
A facedouche is a person who posts stupid, annoying, or braggy stuff on Facebook. They think they're cool, but they're just a bag of hot air.
"I just woke up and I'm feeling amazing!", like it's a big deal.
"I'm eating a bagel... it's a miracle.", no one asked.
"I'm taking a dump... and it's epic.", you're not even famous.