What Does “Posta” Mean in Argentinian Spanish?

"Posta" meaning in Argentinian Spanish

If you’re learning Spanish in Argentina or planning a trip here, there’s a good chance you’ll hear the word “posta” quite often. It’s one of those very common slang words that won’t appear in grammar books, but locals use it all the time.

What does “posta” mean?

In Argentina, posta is an informal way of saying “really,” “for real,” “actually,” or “no joke.” It’s used to confirm that something is true or to ask if something someone told you is actually real.

While it’s commonly used in everyday conversation, keep in mind that posta is not formal language—you wouldn’t use it with your lawyer or accountant. But in casual chats with friends, family, or locals, it’s totally normal and widely accepted.

Examples in context:

Let’s take a look at how posta is used:

— Ayer vi a Messi en un café de Palermo.
(I saw Messi at a café in Palermo yesterday.)

¿Posta? (Really?)

— ¡Sí, te juro! Estaba con su familia, tranqui.  
(Yeah, seriously! He was there with his family, just chilling.)

In this example, Posta? is like saying, “Really?” or “Are you serious?” expressing surprise or doubt.

You can also use it to reinforce what you’re saying:

No, te lo estoy diciendo posta. Pasó en serio.
(No, I’m telling you posta.
It really happened.)

"Posta" examples in Argentinian Spanish
«Posta» examples in Argentinian Spanish

Why is it important to know this word?

If you want to speak like a local or simply understand Argentinians better, learning expressions like posta will help you connect faster. It shows that you’re in tune with everyday language, helps you engage in real conversations, and keeps you from missing the meaning behind casual interactions.

Watch this short video to learn more examples:


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