What is the meaning of No_niin?

OK, all right (utterance expressing exasperation or frustration)

all right (used to indicate support, favor or encouragement)

all right (used to fill space or pauses; used as a general lead-in or beginning)

OK, now, now then (used to introduce a sentence in order to draw attention to the importance of what is being said)

come on (expression of exasperation/impatience)

Source: wiktionary.org

See also