玉に瑕

Meaning

1. expn
   fly in the ointment; small flaw in otherwise perfect object; only trouble; only fault

Example sentences

• 彼女は気が短いのが玉にきずだ。

  A quick temper is the only defect in her character.

• 手八丁口八丁の彼だけど、誠がないのが玉に瑕だね。

  He works fast and is very articulate but his insincerity is his biggest defect.

• トムは運動もできるし優しいしルックスもまずまず。ただね、マザコンというのが玉に瑕なんだよね。

  Tom is able to work out, kind hearted and decent looking, but this is all put to waste by his so called 'mother complex'.