马马虎虎在中文里是一个形容词，意思是"不精细，不细心，不认真"，比如"他的工作马马虎虎"，就意味着他的工作没有做得非常认真细心。

它的来源可能有些争议，但有一种说法是这个词来源于一句俗话："马马虎虎，一年不如一天"，意思是"不够细心，不够认真，年年不如一天"。

例句：

"他的英语马马虎虎，老师提醒他多多练习"（His English is not very good, and the teacher reminded him to practice more.）

"她的房子整理得马马虎虎，不如把它打扫一遍"（Her house is not very clean, so it would be better to clean it.）

"他的工作马马虎虎，老板说他要提高工作质量"（His work is not very good, and his boss said he needs to improve the quality of his work.）