What is Finny Face?
1.
(n.) A face like that of an old, crotchety, mouth-breathing man such as Albert Finny (especially in the movie, "Before the Devil Knows You're Dead); The state of having mouth agape at all times with a look of confused frustration.
He walked around his house with a Finny face, with spit foam forming at the corners of his mouth, wondering to himself "Lord in heaven, where are my pants!?"
See