“Yeah, Nah” Usually Means No

In everyday Australian conversation, “yeah, nah” usually does not signal indecision; it means no. The yeah first acknowledges the offer or shows that the speaker has followed it. The nah then supplies the answer, often making the refusal sound softer than a bare no.

For example: A: Another coffee? B: Yeah, nah, I’m right, thanks. The response means, “No thanks, I’m fine as I am.” It belongs in informal conversation among friends or colleagues. In a formal setting, No, thank you or a fuller explanation is safer. To identify the answer, listen to the final nah.

https://www.oed.com/discover/new-words-from-around-the-world-in-the-oed-june-2026-update/
https://dictionary.cambridge.org/grammar/british-grammar/questions-yes-no-questions-are-you-feeling-cold