眼鏡めがね違ちがい

noun

misjudgment; mistaken choice

Literally 'wrong glasses'; used for picking the wrong person or thing because of a misjudgment, often in a self-deprecating or humorous way.

• 彼かれをリーダーに選えらんだのは眼鏡めがね違ちがいだった。

  Choosing him as the leader was a misjudgment.

• あの店みせをいいと思おもったのは眼鏡めがね違ちがいだった。

  Thinking that shop was good was a mistake.