when you rub your ass in someone's face leaving them disgusted. Started out as a wrestling move used by the Rikishi.
I was given a stinkface by my "best friend." He pulled down his pants, pulled down his underwear and rubbed his ass im my face. He farted first and i thought that was disgusting. Then he took a shit on my face and tied me down. Then he made me kiss his ass and he continued to stinkface me for five hours straight.