a pig in a poke
US /ə pɪɡ ɪn ə poʊk/
UK /ə pɪɡ ɪn ə poʊk/
1.
袋中之猪, 未经检查的东西
something that is bought or accepted without first being seen or examined
:
•
Buying a used car without a test drive is like buying a pig in a poke.
不试驾就买二手车，就像买袋中之猪。
•
I'm not going to sign this contract without reading it first; I don't want to buy a pig in a poke.
我不会在没有先阅读的情况下签署这份合同；我不想买袋中之猪。