Chink in the Armor

1) An narrow opening and vunerable area in one's armor that the opponent will usually aim for. This term relies on "chink" in the sense of "a crack or gap," a meaning dating from about 1400 and used figuratively since the mid-1600s.

2) A figurative term for a one's weakness, largest flaw or their prevention of success.

1) Because of the chink in the armor of Sir Lancelot, his opponent was able to break past his defense and inflict a dangerous flesh wound.

2) We would have aced this presentation if Leo wasn't in our group. He didn't study at all, he's the chink in the armor.

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