草草了事 to do something carelessly
Explanation
草草了事指做事马虎、草率，不认真负责。
To do something carelessly, without paying attention to details, or without taking responsibility.
Origin Story
话说唐朝时期，有个名叫李白的书生，一心想考取功名，光宗耀祖。他勤奋好学，博览群书，然而却常常做事三心二意，草草了事。有一次，他参加乡试，由于准备不足，答卷敷衍了事，结果名落孙山。李白痛定思痛，决心改变自己，从此认真对待每一件事，最终金榜题名，成为一代诗仙。
During the Tang Dynasty, there was a scholar named Li Bai who aspired to pass the imperial examination and bring honor to his ancestors. He was diligent and widely read, yet he often approached tasks halfheartedly, finishing them carelessly. Once, he participated in the regional examination, but due to insufficient preparation, his answers were perfunctory, and he failed. Li Bai reflected deeply on his shortcomings, resolved to change his ways, and dedicated himself fully to every endeavor thereafter. Eventually, he achieved success in the examinations and became a renowned poet, known as the 'immortal' poet.
Usage
草草了事通常作谓语、状语、定语，形容做事不认真，敷衍了事。
The idiom 'cǎocǎo liǎoshì' is typically used as a predicate, adverbial, or attributive, describing the careless and perfunctory completion of tasks.
Examples
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他做事一向草草了事，从不认真。
ta zuòshì yīxiàng cǎocǎoliǎoshì, cóng bù rènzhēn.
He always does things carelessly and never seriously.
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这次考试，他草草了事，结果考得很差。
zhè cì kǎoshì, tā cǎocǎoliǎoshì, jiéguǒ kǎo de hěn chà.
He dealt with the exam carelessly, resulting in a poor grade.