(买)未看过的东西;(买)不知优劣的东西
牛津电影里 100%
if you buy a pig in a poke, you buy sth without seeing it or knowing if it is good enough
Nah, it's a bloody pig in a poke, isn't it?
释义来自《牛津高阶英汉双解词典》第 9 版