phrase/ˌno ˌni ˈna/
absolutely, of course, you bet, without a doubt (used as a strong, emphatic affirmation or agreement)
“—¿Hace calor en Málaga en agosto? —¡No ni ná!” — —Is it hot in Málaga in August? —You bet it is!
Contraction and elision of no (“no”) + ni (“nor”) + nada (“nothing”) (pronounced as ná in Andalusian Spanish). Literally translates to "no, nor nothing." It is a triple negative that functions ironically as an emphatic positive.