noun
time of weakness; moment of vulnerability
Refers to a moment when one is physically or mentally weak, often used in proverbs or set phrases like 弱り目に祟り目 (misfortunes never come singly).
弱り目に祟り目で、風邪を引いた上に財布を落とした。
Misfortunes never come singly: I caught a cold and then lost my wallet.
彼は弱り目に付け込まれて、悪い契約を結ばされた。
He was taken advantage of in his moment of weakness and forced into a bad contract.