huh
From Longman Dictionary of Contemporary Englishhuhhuh /hʌh, hʌ/ interjection 1 UNDERSTANDused to show that you have not heard or understood a question ‘Carly, are you listening to me?’ ‘Huh?’2 especially American EnglishAGREE used at the end of a question, often to ask for agreement Not a bad little place, huh?3 DISAGREEused to show disagreement or surprise, or to show that you do not find something impressive ‘She looks nice.’ ‘Huh! Too much make-up, if you ask me.’Origin huh (1600-1700) A natural sound