Bates face
When some creep or weirdo stares at you so intently, just like Norman Bates from the movie Psycho, they are giving you a Bates face.
"Did you just see that weirdo give me a Bates face?"
"Stop staring at me with your Bates face, it's creeping me out!"
"Stop staring at me with your Bates face, it's creeping me out!"