ba-dum ching

humorous

(humorous) Used to underscore or acknowledge a joke.

Japanese Meaning

（ユーモラスな効果音として）ジョークやダジャレの後に、リムショットを模した効果音・間延びした表現として用いられ、冗談を強調または認識するための感嘆詞

When she finished the punchline, someone in the back shouted, 'ba-dum ching'.

彼女がオチを言い終えると、後ろの誰かが「リムショット！」と叫んだ。

Sense（1）

(humorous) Used to underscore or acknowledge a joke.

She gave it a little spin as it came off her right arm, then sent it flying. It landed on his head with aplomb, and she laughed. "Ba-dum, ching!"