It sounds like the slang or street version of 'no', sometimes sounding like 'uh uh', or 'nuh uh'. It is a word some English speakers use without giving it a thought, and English speakers know what it means. But it would be very inappropriate where you would like you speech or writing to be taken seriously.
If it is a word in a language other than English, you are required to give the language of the word of phrase when asking for a translation.
Nah-man
Nah, someday is a noun.
No.
nah
Having researched this for hour's, I have come to the conclusion that it is just sounds, i.e. the "FaFaFa" song by Otis Redding. Overton Lemons, who came to be known as Smiley Lewis, wrote the song. A successful entertainer in New Orleans, La. search for Smiley Lewis on Allmusic.com, Google, etc. for more details of his musical talent.
"Nah nah" is a casual way of saying "no" or expressing disagreement. It is often used in informal conversations or slang language.
agh
silver hydride
nah
Du-agh-mu-tef
the mood of you
It means "nah"
Nah...
Its "Goodbye" by Kristina Debarge. It goes: Nah nah nah nah nah nah nah nah hey hey hey goodbye
Agh
Agh, Not In Priison. D:
people say nah because they like BBQ lol i say nah all the time so i dont really care nah nah nah BBQ / nah who reads this right here they have to say nah everyday and make two Facebook nah nah nah your all loser ha ha ha ha.... nah nah nah this is a girl nah nah love that you dum head nah nah nah nah its more funny is school lol nah nah nah i do nah 24/7 nah nah nah nah nah nah try it in school nah nah nah nah and say you look like a BBQ nah nah nah ok nah nah nah nah nah bye nah lol