バキューン

adverb taking the 'to' particle

bang; pow; pew pew

Onomatopoeic word mimicking the sound of a gunshot, often used in manga, anime, or playful contexts.

• 子こ供どもが指ゆびでバキューンと撃うつ真似まねをした。

  The child pretended to shoot, going 'bang' with their finger.

• 漫まん画がのコマに「バキューン」と書かいてあった。

  The manga panel had 'bang' written on it.