Nah (interjection)

1. Used to express rejection, disbelief, or dismissal of something.
2. Used to refuse or decline something or someone.

Origin:

Late 20th century: of uncertain origin.

Examples:

1. Do you want to go out for dinner tonight? Nah, I'm not feeling well.
2. Did you like the movie? Nah, it was too slow for my taste.
3. Can I borrow your car? Nah, I need it today.
4. Would you like to join us for the trip? Nah, I have other plans.
5. Can I have a sip of your drink? Nah, it's not mine.