Have you been hearing people on TikTok or at school saying, “What’s up, brother?” You can thank Sketch for that. If you’ve never heard of him, here’s all you need to know to understand the overnight streaming sensation. A little while ago, a TikTok went viral for asking girls to say “What’s up, brother” to their male partners while holding up a finger. Many were shocked when the guys would all respond with the same weird phrases and hand movements since not everyone knew where it all came from. You can thank a streamer known as Sketch for making guys repeat these phrases to each other all day….