DictionaryfoibleMinor character flaw
noun

foible

FOY-bul/ˈfɔɪbl/

A minor weakness or flaw in someone's character.

Constantly straightening already-neat pencils is a minor foible that amuses the colleague.

Adult compulsively straightens already-neat pencils into perfect parallel rows while colleague smiles affectionately, harmless minor foible.
Etymology

The pieces formed Latin flebilis, “to be wept over” or “lamentable,” which became “weak” in French. English transferred the word from a sword blade’s weak point to a weakness of character.

In context

TED12:53
we actually take delight in people getting things wrong, so that we can then moan and groan and bitch at them. And this, I would say, is the biggest human foible that we have.
Ian Dunbar: Dog-friendly dog training

More examples

  • We learn to laugh at our own little foibles.
  • A little vanity is a harmless foible, not a serious fault.
  • His friends accept his foibles without trying to change him.

Forms

foible · foibles

Similar words

weakness
Can describe a more serious shortcoming, not necessarily in character.
failing
Often suggests a more blameworthy fault in character or conduct.