What is Hillbilly Mask?
1.
When a female is giving you head remove your penis and act like you are about to give her a facial. Instead of giving her the facial continue to masturbate on her face while removing your dip then slingging it across her face saying, "Gotcha Bitch!"
"Yeah, I gave that girl a hillbilly mask!" (normally followed by a round of intense round of high-fives)
See