(買)未看過的東西;(買)不知優劣的東西
牛津電影裡 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?
釋義來自《牛津高階英漢雙解詞典》第 9 版