不三不四
bùsān-búsì
dubious; shady; nondescript; neither one thing nor the other
Every meaning
bùsān-bùsì
- dubious; shady
- nondescript; neither one thing nor the other
Its characters
Words with 不
Words with 三
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.