As-salamu alaykum is a traditional Arabic greeting used by Muslims for centuries, meaning peace be upon you, and the expected reply is wa alaykum as-salam. Online, the exchange has been clipped, shared and respelled in searches as salamalecum and maleikum salam, turning an everyday religious greeting into a familiar soundboard hello. Its popularity on meme pages and in chats comes from its clear call and response rhythm, which works as both a genuine salutation and a recognisable audio cue for someone arriving.