The word pendos is Russian colloquial slang for an American, often used in a joking or derogatory way online. This version stretches the word into pendos with repeated vowels, a spelling that mirrors how the shout is performed and searched for on soundboards. Clips built around a single shouted slang word spread easily because they need no context, work as instant reactions, and can be reused across gaming, chat, and meme edits. Its popularity comes from that flexibility rather than from a single known source recording.