鉄てっ砲ぽう玉だま

noun

gunshot; bullet

Literally a bullet or shot from a gun; can refer to the projectile itself or the act of shooting.

• 鉄てっ砲ぽう玉だまが壁かべに当あたった。

  The bullet hit the wall.

noun

messenger who doesn't return; one-way messenger

Idiomatic: a person sent on an errand or mission who is not expected to return, like a bullet once fired. Often used in underworld or dramatic contexts.

• 彼かれは鉄てっ砲ぽう玉だまとして敵てき陣じんに送おくり込こまれた。

  He was sent into enemy territory as a one-way messenger.

noun

bull's-eye candy

A type of hard candy with a bull's-eye pattern, named after its resemblance to a target or bullet hole.

• 駄だ菓が子し屋やで鉄てっ砲ぽう玉だまを買かった。

  I bought some bull's-eye candy at the cheap sweets shop.