Rob Kardashian is back to his public life after years staying in hiding and it looks like he really enjoys being on social media again! The Keeping Up with the Kardashians star decided to tease none other than Tristan Thompson over his new hairstyle and he had a blast! The only Kar-Jenner son could not help but playfully drag his sister Khloe’s ex, giving the basketball player a hard time over this weekend.