RWR stands for radar warning receiver, the onboard system that alerts a pilot to detected radar emissions and possible targeting threats. Online, F-14 RWR audio is commonly shared in flight sim communities and military edit circles, where creators use it as a shorthand for danger, pursuit, or being tracked. Its appeal comes from how quickly the tone communicates stress and urgency, even to viewers who are not aviation experts. That makes it useful in both realistic jet content and exaggerated meme edits.