Definition of nuh-uh in English:

nuh-uh

(also nunh-unh, nunh-uh, nuh-unh)

adverb

US
informal
  • No; used especially to rebuff or contradict.

Origin

1920s. Imitative. Compare uh-huh, uh-uh.

Pronunciation

nuh-uh

/ˈnʌˌʌ//ˈnəˌə/