马大哈 Traditional form: 馬大哈 Pinyin (reading): mǎdàhā Definitions: a careless person scatterbrain frivolous and forgetful abbr. for 馬馬虎虎、大大咧咧、嘻嘻哈哈/马马虎虎、大大咧咧、嘻嘻哈哈 Characters: 马 - horse; surname 大 - big, great, vast, high, deep 哈 - the sound of laughter Traditional characters: 馬 - horse; surname 大 - big, great, vast, high, deep 哈 - the sound of laughter