Fuck Off Challenge

What you tell someone to do when they get obsessed over a challenge on the internet or just someone you fucking hate that's extraordinarily annoying.

Eric:"Rob, I think since you love doing dangerous challenges and not bothering to do anything productive in your life. I suggest you try the Fuck Off Challenge."
Rob:"The Fuck Off Challenge? How do you play it Eric?"
Eric:"Fuck off and do something productive with your life."
Rob: * D: *