màn​bù​jīng​xīn

careless

漫不经心 (漫不經心) màn​bù​jīng​xīn
careless idiom
performing an action without paying sufficient attention or focus; negligent
indifferent idiom
displaying a lack of concern, interest, or seriousness toward a matter

Frequency

Movie subtitles
0.480 per million appears in 0% of films
Written text
1.78 per million

Sources

Definitions
CC-CEDICT