没心没肺
méi​xīn​méi​fèi

heartless

没心没肺 (沒心沒肺) méi​xīn​méi​fèi
heartless idiom
ungrateful, cruel, or lacking a conscience; unfeeling toward others

他是个没心没肺的人，完全不顾及家人的感受。

tā shì gè méi​xīn​méi​fèi de rén, wán​quán bù gù​jí jiā​rén de gǎn​shòu.

He is a heartless person who completely disregards his family's feelings.

scatterbrained expression
thoughtless, mindless, or extremely forgetful; lacking attention to detail

我这人没心没肺的，刚才还拿着钥匙，转眼就找不到了。

wǒ zhè rén méi​xīn​méi​fèi de, gāng​cái hái ná zhe yào​shi, zhuǎn​yǎn jiù zhǎo bù dào le.

I'm so scatterbrained; I was holding my keys just a moment ago and now I can't find them.

simple-minded expression
guileless, innocent, or carefree; having a disposition that does not harbor worries or complex schemes

她整天没心没肺地傻笑，好像从来没有烦恼。

tā zhěng​tiān méi​xīn​méi​fèi de shǎ​xiào, hǎo​xiàng cóng​lái méi​yǒu fán​nǎo.

She giggles lightheartedly all day, as if she doesn't have a care in the world.

Frequency
Written text
4.39 per million

Sources
Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)