無む効こう票ひょう

noun

invalid vote; spoilt ballot; faulty ballot

Refers to a ballot that is not counted because it is incorrectly marked, damaged, or otherwise invalid. Used in election contexts.

• 選せん挙きょで無む効こう票ひょうが多おおく出でた。

  There were many invalid votes in the election.

• 無む効こう票ひょうの数かずは全ぜん体たいの2％だった。

  The number of spoilt ballots was 2% of the total.