打うち子こ

noun

clapper; hammer; vibrator; doorknocker

Refers to the striking part inside a bell, or a similar knocking/hammering device. Also used for a vibrator in some contexts.

• 鐘かねの打うち子こが壊こわれて音おとが出でない。

  The bell's clapper is broken and makes no sound.

• ドアの打うち子こを鳴ならしたが、誰だれも出でなかった。

  I knocked with the doorknocker, but no one answered.

noun

pachinko player with insider knowledge

Slang term for a pachinko player who wins by knowing the machine's internal settings or timing. Not a general term for a skilled player.

• 彼かれは打うち子ことして、裏うら情じょう報ほうを使つかってパチンコで勝かち続つづけている。

  He keeps winning at pachinko as an insider player using backdoor information.