birthday bump

A beating given to someone on their birthday, typically of a number corresponding to their age.

Japanese Meaning

誕生日の人に対し、その年齢に応じた回数の打撃を加える行為、またはその儀式。

When he arrived at the party, the kids surprised him with a rowdy birthday bump of ten quick taps, and he ended up laughing and rubbing his shoulder.

パーティーに着くと、子どもたちは彼に年齢と同じ10回の軽い叩きをするという騒がしい誕生日の習慣を行い、彼は笑いながら肩をさすっていた。

Sense（1）

A beating given to someone on their birthday, typically of a number corresponding to their age.

birthday bumps

（ plural ）