粗心大意

Explanation: Crude: Crude vegetable. Means sloppy work, not careful. 　　Usage: Joint type; as predicate, object, attribute; containing derogatory things or do things for the parties to consider 　　Source: Qing Wen Kang "Heroic Biography" The Fourth: "suddenly had an inspiration, enlightenment will come in mind: 'This is my carelessness. If I do not go in, how had he come out?'" 　　Examples: When done carefully examine the topic title and can not ~. Thesaurus:  s clothes, Flighty and impatient Qizao, careless (in handling things), Careless Flotation, flighty and impatient coarse temperament, proud and arrogant, neglect, listlessness, culpa, Fail do cause (sb/sth) to be in a certain condition, don't cause (sb/sth) to be in a certain condition, slip, fail or neglect to do sth