Assalamu alaikum is a traditional Arabic greeting used by Muslims around the world, meaning peace be upon you, with the customary reply Wa alaikum assalam. Rooted in Islamic tradition and everyday Arabic speech for centuries, it is heard in homes, mosques and public greetings across many cultures. Online, the shortened audio form spread through meme soundboards, TikTok and messaging apps as a shareable greeting clip, detached from longer religious contexts and reused mainly to start videos, greet friends and mark a friendly arrival.