ugly AmericanEnglishOxford Dictionary of Englishugly American /ˌʌɡli əˈmɛrɪk(ə)n / ▸ noun derogatory an American who behaves in a coarse or offensive way when abroad: the phrases every ugly American needs to know [as modifier] I go into my ugly American routine of wolfing down a quick meal and promptly sacking out.