无所用心
wúsuǒ-yòngxīnTraditional 無所用心
to be idle; not to give one's mind to anything
Every meaning
wúsuǒ-yòngxīn
- to be idle; not to give one's mind to anything
Its characters
Words with 无
Words with 所
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.