When a girl receives a football in the face, usually by accident.
The Pigskin Facial was made famous by Sportscaster Pam Oliver in 2013.
"Man, that throw was a perfect spiral, she should have caught it with her hands, but instead she got a massive pigskin facial!"
Video example, see: Pam Oliver takes Chandler Harnish football to the face before Colts-Giants game