The Kraber is the iconic high-damage sniper rifle from Apex Legends, famous for one-shot highlights and flick shots that look unbelievable in real time. 'Sus' comes from online gaming slang for a play that looks suspiciously good, the kind of clip friends jokingly flag as cheating. This particular upload is credited to OhNocturnal on a user-generated soundboard, and like many short FPS clips it circulates as a reaction sound: a quick way to call out a nasty sniper shot or hype up your own highlight with a wink.