马大哈mǎ dà hāmadahaa careless personscatterbrainfrivolous and forgetfulabbr. 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 in this word哈the sound of laughter大big, great, vast, high, deep马horseStudy it in Yanamino