Pariguayo is a long-standing piece of Dominican Spanish slang for a naive, shy or socially awkward person, often the one who watches a party instead of joining in. Online, the word escaped its local context and became a short meme label that Spanish and English speaking creators both use as an instant roast. Soundboard clips helped spread it beyond Dominican audiences, because the exaggerated pronunciation is funny and clear even in isolation. It remains popular for reaction edits where a single word needs to mock foolish behaviour without extra explanation.