What is fatface?

A face that has fat from other body parts injected to it.

A:Wow have you seen Kim's new cheeks, she's certainly not letting her liposuction go to waste.

B: Aggree, she has the best fatface out there.

fatface - meme gif

when someone has a thin body, but they still have a really fat face, making them look bigger than they actually are

Rachael Ray has crazy fatface.