喫不到葡萄說葡萄酸 [ㄔ ㄅㄨˋ ㄉㄠˋ ㄆㄨˊ ˙ㄊㄠ ㄕㄨㄛ ㄆㄨˊ ˙ㄊㄠ ㄙㄨㄢ; chi1 bu4 dao4 pu2 tao5 shuo1 pu2 tao5 suan1] sour grapes (set expr. based on Aesop) lit. to say grapes are sour when you can't eat them ◄ ►