earphone phaker
When someone acts like they’re into their music, but they’re actually spying on you like you're on a reality show. They might even whisper to themselves about how dumb you are.
He had his earphones on and was whispering 'this guy is a total idiot' while I was talking about my day.
She was listening to her playlist, but she was eavesdropping on my friend’s rant about her job.
He had earphones on and was talking to himself about my terrible taste in food.