nuh-uh
/ˈnəˌə/ /ˈnʌˌʌ/(also nuh-unh, nunh-uh, nunh-unh) informal (chiefly US )
adverb
No; used especially to rebuff or contradict.
- Frequently in representations of direct speech..
Origin
1920s. Imitative. Compare uh-huh, uh-uh.