Troll his social media selfies.
How to do it: "You copped that? Shit's wack tho."
Going in for the kill on social media is a cowardly move, but nonetheless effective. Whether you comment on a selfie about a product, or go for the whole "your outfit sucks" in a photo he's tagged in, rest assured that you've hit him in the most vulnerable spotâ€”right in the Internet.