yī​chuí​zi​mǎi​mài

one-off deal

一锤子买卖 (一錘子買賣) yī​chuí​zi​mǎi​mài
one-off deal verb
a short-sighted transaction conducted only once without consideration for future cooperation or reputation
one-shot effort verb
a single, decisive attempt where everything is staked on one try

Frequency

Written text
0.149 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)